Patent statistics are frequently cited as evidence that China is becoming an innovation powerhouse and a formidable technological competitor. Headlines noting that Chinese inventors have surpassed U.S. inventors in international patent filings naturally encourage that conclusion. Patent data are consistent with the conclusion that China has become a major innovative economy. However, patent statistics can be used to measure several different things at once, including inventive activity, commercialization strategies, export orientation, government incentives, and the structure of the underlying patent system. Understanding what patent statistics measure well is often as important as understanding the statistics themselves.

This blog does not attempt to determine whether China is innovative. The evidence on that question is already substantial. Instead, it examines how patent data are often used to assess China’s competitive strength and considerations that might help to optimally interpret that data.

What Patents Are

Patents provide the right to exclude others from making, using, selling, offering for sale, or importing a patented invention for a limited period of time. In exchange, the inventor must publicly disclose the invention. Patents therefore encourage certain forms of innovation by providing a temporary right to exclude while also expanding the public stock of technical knowledge.

Patents are a useful marker of innovation, but they are not a complete measure of innovation. Many important technologies are protected through secrecy rather than patents. Industrial process technologies, manufacturing know-how, factory automation techniques, supply chain innovations, and other trade secrets may have commercial value precisely because they are not publicly disclosed. Patent data may also understate innovation in areas where firms rely heavily on trade secrets, including manufacturing processes, factory automation, supply chain management, and other forms of process innovation. This limitation may be particularly relevant when assessing China’s manufacturing competitiveness. To the extent that competitive advantages arise from operational expertise, production techniques, or other proprietary know-how that is not publicly disclosed, patent statistics may capture only part of the underlying innovative activity. Plant varieties are another area that is often also protected through separate intellectual property protection systems. Many countries, such as China, also offer utility model patents, which generally provide shorter-term protection for incremental technical improvements. It is important not to confuse a U.S. utility patent with a utility model patent. What Americans commonly call a utility patent is generally referred to elsewhere as an invention patent.

Some technologies are also more dependent on fewer patents than others. A blockbuster new pharmaceutical may depend heavily on a small number of patents protecting a single molecule. By contrast, smartphones, telecommunications equipment, and other complex technologies may involve thousands of patents which only describe incremental improvements. In some fields, scientific publications may provide a better indicator of technological progress than patenting activity.  Moreover, the pace of manufacturing may lag behind the patenting disclosure.  In many instances, patents can often be more useful as a predictor of possible future competitive challenges than as a snapshot of current innovation.

Patents are also not monopolies. A monopoly is an economic concept involving market power. A patent grants exclusive rights over a specific invention, but competitors may possess alternative technologies, substitute products, or improvement patents. A patent may therefore confer commercial value without monopoly power.

Patents are territorial. A U.S. patent provides rights only in the United States. A Chinese patent provides rights only in China.

Finally, patents cannot literally be “stolen.” Patent infringement occurs when a party practices a patented invention without authorization. The remedy is typically civil compensation and injunctive relief. When policymakers speak about “IP theft,” they are generally referring to other forms of misconduct, including trade secret theft, misappropriation of confidential information, or related conduct.

Why National Patent Counts Are Often Imperfect Measures of Innovation

Not all patents have the same commercial significance. A patent protecting a breakthrough pharmaceutical may be worth billions of dollars. A patent covering a minor improvement in existing technology may have little economic value. Even within the same technological field, patent values vary enormously.  Moreover, not all industries or industrial sectors are equally dependent on patents.  Countries may also decline to afford patent protection in certain technologies, making direct international comparisons in certain technologies especially difficult.  Firms often respond to differences in legal protection by relying on other forms of intellectual property protection, including trade secrets, copyrights, trademarks, and contractual protections.

Patent researchers use various methods for assessing patent quality which typically reflect both the need to weed out low quality patents as well as the type of technology being evaluated.   One common approach is to examine overseas patent filings. Foreign patent filings are often viewed as a stronger indicator of patent quality than domestic filings alone. One reason is cost: applicants incur substantial additional expense when seeking protection in multiple jurisdictions. However, cost alone is not the reason that overseas filings are considered significant. Another reason to consider overseas patents is that multiple patent offices, operating under different legal standards, examination practices, and prior art databases, will have independently determined that an invention satisfies the requirements for patentability. For this reason, triadic patents, which are filed in the United States, Europe, and Japan, have traditionally been viewed as a useful indicator of technological and commercial relevance. Similarly, applications filed through the Patent Cooperation Treaty system often indicate that an applicant intends to seek protection in multiple jurisdictions and believes the invention has value in more than one market.

Another useful indicator is whether patents are being maintained after grant. Patent owners must often pay maintenance fees to keep patents in force. A patent abandoned shortly after issuance may have little commercial significance. A patent maintained throughout most or all of its term often reflects a continuing expectation of value.

Patent citations can also provide useful information. A backward citation occurs when a patent cites earlier patents or publications that are relevant prior art. Backward citations can help place an invention in its technological context and may indicate whether an inventor is building upon a well-developed field or appears to be moving into less explored territory. A forward citation occurs when a later patent cites an earlier patent as relevant prior art. A heavily cited patent may indicate that subsequent inventors regarded it as an important technological contribution. 
Not all citations, however, are equally informative. Citations by unrelated parties are generally more significant than citations by the same inventor or the same company, as they may provide stronger evidence that the patented technology influenced innovation beyond the patent owner’s own research program. A highly valuable patent may receive relatively few citations, while a heavily cited patent may not necessarily be commercially important. Citation analysis for an individual patent is therefore best viewed as one indicator among many rather than a definitive measure of individual patent quality.  It may, however, be useful in evaluating general considerations of national technological competitiveness based on patent counts, than simple patent counting alone.

Who owns a patent may matter as well. Historically, Chinese overseas patenting was often associated with universities and government-affiliated research institutions. Universities and research institutes frequently patent for reasons that differ from those of operating companies. Patents may support academic promotion, research funding, institutional rankings, technology transfer efforts, or graduate degree requirements. As a result, patent counts from Chinese universities are not always directly comparable to patent counts from commercial enterprises.  The same logic may not apply to other countries.

China’s patent statistics require special attention because patenting activity has historically been influenced by government policy incentives. For many years, various levels of the Chinese government offered subsidies or other incentives for patent filings. Patent-related targets also appeared in government plans and institutional evaluations. These policies contributed to rapid growth in patent filings, but they also created incentives to file patents that may not have significant commercial value. Application counts do not indicate whether patents are granted, maintained, commercialized, licensed, litigated, or otherwise used in the marketplace. Grant rates and maintenance rates often provide more useful information about patent quality than application counts alone because they reflect both examination outcomes and the patent owner’s continuing assessment of value.

Numerous patents directed to the same underlying technology may also warrant closer examination. A large portfolio may reflect a broad and valuable technology platform, but it may also reflect the division of related inventions into multiple applications or the accumulation of patents around a single patent family. Patent family analysis can therefore provide additional insight into the significance and scope of a company’s innovative activity.

Taken together, these and other measures suggest that patent quality is multidimensional. No single metric, whether patent counts, citations, overseas filings, maintenance rates, or patent families, can fully capture the technological or commercial significance of an invention. The question is therefore not whether China is innovative. The question is what patent statistics can tell us about the nature and extent of China’s innovative and competitive capabilities. 

Patent statistics should also be considered alongside scientific publications, trade data, and other indicators of innovative activity. Together, these measures can provide a more complete picture of technological development, commercialization, and international competitiveness.

Can Patent Data Measure China’s Competitive Strength?

The same techniques that apply to evaluating individual patents do not always apply with equal force when evaluating the relative competitive strength of a country. This is especially true in the case of China. Nonetheless, China’s patent system is now so large that even a relatively small percentage of commercially relevant patents may represent a substantial volume of innovative activity. At the same time, the size of the system makes it particularly important to distinguish between patent quantity and patent quality, as well as between different classifications of technologies which may show differing technological strengths.

One useful benchmark is the extent to which Chinese innovators seek patent protection in foreign markets. Because foreign patent filings require additional expense, familiarity with foreign legal systems, and a belief that protection will be valuable in overseas markets, they are often viewed as a more selective indicator of innovative and commercial activity than domestic filings alone. Foreign filings are also less likely to be influenced by domestic subsidy programs and other country-specific incentives.

Recent China-U.S. filing data illustrate both the value and the limitations of patent statistics. According to the most recent edition of the Chinese Intellectual Property Yearbook (2024), Chinese applicants filed 49,740 invention patent applications in the United States in 2023. At first glance, this figure appears to support claims regarding China’s growing technological competitiveness.  The fact that Chinese applicants incur the cost of filing abroad also suggests that they view at least a portion of these inventions as having commercial relevance outside China.

Yet these filings represented only approximately 3 percent of China’s domestic invention patent applications during the same year. The percentage would be significantly lower if Chinese design patent and utility model patent applications were also included. The data has consistently shown that overseas patent filings in fact represent a relatively small subset of China’s overall patenting activity.  Using the same logic as triadic or PCT filings, this may also be a more selective and higher quality subset.  Many other patent offices have a large cohort of domestic filings.  Many analysts regard foreign filings as a more useful indicator of commercially significant innovation than domestic patent counts alone. 

Foreign patent filings also tell us not only where innovation occurs, but also where innovators believe future commercial opportunities exist.  A reciprocal comparison also provides insight into how foreign companies view China’s patent system and the commercial importance of the Chinese market.  According to the 2024 Intellectual Property Yearbook published by China National Intellectual Property Administration, U.S. applicants filed 40,380 invention patent applications, 5,007 design patent applications, and 1,329 utility model patent applications in China during 2023, for a total of 46,716 filings across the three principal forms of Chinese patent protection.

The total number of Chinese invention patent applications filed in the United States therefore exceeds the total number of U.S. patent filings in China.   Does the United States therefore suffer from an annual “patent deficit” in its relationship with China?   Several considerations caution against a direct comparison of these figures:

1. The Chinese figure includes only invention patent applications filed in the United States, while the U.S. figure includes invention patents, design patents, and utility model patents filed in China.

2.  Patent systems differ in structure, incentives, and filing practices. In order to get a better sense of the relative importance of patenting activity, one would need look at the number of patents being maintained from year to year, as well as the cumulative patent holding by each country in the other.

3.  The data suggest that U.S. firms continue to make extensive use of China’s patent system and continue to view patent protection in China as commercially valuable, while Chinese firms are increasing their portfolio in the U.S.  However, that nature of those holdings appears to be responding to certain economic factors.  Put differently, the reciprocal filing data provide information not only about Chinese competitiveness, but also about how foreign companies assess the value of the Chinese market and China’s intellectual property system.  In addition, the increase in design patent protection by US companies in China may also be closely tied to efforts by the US government and practitioners to encourage greater use of China’s design patent and utility model system to safeguard their innovations.

This comparison becomes especially interesting when design patents are considered. Data from the ID5 industrial design offices, which include China, the European Union, Japan, Korea, and the United States, indicate that Chinese applicants account for a substantial share of foreign design filings in major patent jurisdictions. The broader ID5 data suggest that Chinese overseas patenting activity is concentrated in the world’s largest and most significant markets rather than being dispersed broadly across jurisdictions. If foreign patent filings are viewed as investments, Chinese applicants appear to be concentrating those investments where they expect the greatest commercial returns.  Chinese firms appear to make extensive use of the U.S. design patent system, particularly in industries tied to consumer products, manufacturing, and export markets. Consequently, design patent activity may reveal as much about commercialization strategies and export orientation as it does about technological innovation. 

These types of observations may ultimately be more significant than the filing numbers themselves. Patent applications represent investments. Applicants incur filing costs, prosecution expenses, translation costs, maintenance fees, and potential enforcement expenses. The willingness of Chinese firms to continue seeking large numbers of patents in the United States suggests that they continue to view the U.S. market as commercially important and U.S. intellectual property rights as worth obtaining. 

At the same time, all patent filing statistics should be interpreted with caution. Application counts do not indicate whether patents are granted, maintained, commercialized, licensed, litigated, or otherwise used in the marketplace. Patent filings may also be concentrated within a relatively small number of firms or technologies. A country can generate large numbers of patents without necessarily achieving broad-based technological leadership.

Patent statistics may also be affected by non-market factors. For many years, China’s patent system included subsidies and other incentives that encouraged patent filings. These incentives generally had their greatest effect on domestic filings, which is one reason that overseas patenting as well as patent grants or patent maintenance are often viewed as more useful indicator of quality than domestic application counts alone.

More recently, the USPTO identified thousands of patent applications affected by falsified signatures and related irregularities. As of 2025, the Office had identified more than 3,900 affected applications and terminated more than 3,400 application proceedings. Although these cases span multiple filing years and represent only a small fraction of overall Chinese-origin filings, they illustrate the need for caution when relying on raw patent counts.

Nationality-based patent statistics present another challenge. Patent offices generally classify filings by applicant nationality or residence rather than by the location where research was conducted. Some Chinese-origin patent filings may reflect research undertaken by foreign-invested enterprises operating in China.  Foreign-invested enterprises were historically believed to account for a disproportionate share of higher-quality patent filings originating in China, and were statistically reported on in yearbooks of the Ministry of Science and Technology.  Conversely, some U.S.-origin filings in China may reflect inventions developed in China and assigned to U.S. parent companies. Inventions that are co-developed between US and Chinese collaborators may choose to file first in one jurisdiction before the other.  Patent statistics therefore reveal where rights are being sought, but they do not always reveal where innovation predominantly occurred.

None of these limitations mean that patent data should be ignored. On the contrary, patent statistics remain one of the most valuable tools available for understanding technological competition. They can reveal patterns of commercialization, international expansion, cross-border collaboration, technology development, emergence of technological clusters, and market priorities that may not be visible through other measures.

The lesson is not that patent statistics are meaningless. Rather, it is that they should be interpreted carefully. Patent data can tell us a great deal about China’s competitive strengths, commercialization strategies, export orientation, and strategic priorities.  As patents can be 20-year investments, they may also be useful predictors of future technological trajectories.  Patents may also be both a contributor to ongoing innovation and an outcome of innovation.  They are rarely the sole indicator of current or future competitiveness. Ultimately, the strongest test of technological competitiveness is whether innovations are successfully commercialized in domestic and international markets.

Top image: French patent for a dry docking a ship (1791). Bottom image: US plant patent for an azalea (1952).