Can Post-Grant Reviews Improve Patent System Design? A Twin Study of US and European Patents

This paper assesses the impact of adopting a post-grant review institution in the US patent system by comparing the “opposition careers” of European Patent Office (EPO) equivalents of litigated US patents to those of a control group of EPO patents. We demonstrate several novel methods of "twinning" US and European patents and investigate the implications of employing these different methods in our data analysis. We find that EPO equivalents of US litigated patent applications are more likely to be awarded EPO patent protection than are equivalents of unlitigated patents, and the opposition rate for EPO equivalents of US litigated patents is about three times higher than for equivalents of unlitigated patents. Patents attacked under European opposition are shown to be either revoked completely or narrowed in about 70 percent of all cases. For EPO equivalents of US litigated patents, the appeal rate against opposition outcomes is considerably higher than for control-group patents. Based on our estimates, we calculate a range of net welfare benefits that would accrue from adopting a post-grant review system. Our results provide strong evidence that the United States could benefit substantially from adopting an administrative post-grant patent review, provided that the post-grant mechanism is not too costly

Can Post-Grant Reviews Improve Patent System Design? A Twin Study of US and European Patents

This paper assesses the impact of adopting a post-grant review institution in the US patent system by comparing the “opposition careers†of European Patent Office (EPO) equivalents of litigated US patents to those of a control group of EPO patents. We demonstrate several novel methods of "twinning" US and European patents and investigate the implications of employing these different methods in our data analysis. We find that EPO equivalents of US litigated patent applications are more likely to be awarded EPO patent protection than are equivalents of unlitigated patents, and the opposition rate for EPO equivalents of US litigated patents is about three times higher than for equivalents of unlitigated patents. Patents attacked under European opposition are shown to be either revoked completely or narrowed in about 70 percent of all cases. For EPO equivalents of US litigated patents, the appeal rate against opposition outcomes is considerably higher than for control-group patents. Based on our estimates, we calculate a range of net welfare benefits that would accrue from adopting a post-grant review system. Our results provide strong evidence that the United States could benefit substantially from adopting an administrative post-grant patent review, provided that the post-grant mechanism is not too costly.patent system; post-grant review; opposition; litigation

Prospects for Improving U.S. Patent Quality via Post-grant Opposition

The recent surge in U.S. patenting and expansion of patentable subject matter has increased patent office backlogs and raised concerns that in some cases patents of insufficient quality or with inadequate search of prior art are being issued. At the same time patent litigation and its costs are rising. This paper explores the potential of a post-grant review process modeled on the European opposition system to improve patent quality, reveal overlooked prior art, and reduce subsequent litigation. We argue that the welfare gains to such a system may be substantial.

Patenting by Entrepreneurs: An Empirical Study

[T]he Ewing Marion Kauffman Foundation--an organization that studies and promotes entrepreneurship in the United States--funded an effort at the University of California, Berkeley School of Law, to undertake the first comprehensive survey of the relationship between patenting and entrepreneurship in the United States. The authors, along with other investigators, administered the survey in 2008 to approximately 15,000 startup and early-stage companies in the biotechnology, medical device, information technology (IT) hardware, and software and Internet sectors. A portion of the survey examined why entrepreneurs, startups, and early-stage companies do (and do not) seek patents. This Article reports and analyzes results from that survey, showing that several widespread beliefs about startup firm patenting practices are very likely wrong. In brief, like the surveys of large firms, our respondents that hold patents report that the main motivation for patenting is to prevent others from copying their products and services. This result holds--and is statistically valid--across a variety of company characteristics, including firm age, revenues, industry, and patent portfolio size. Because we find that many young technology companies are holding patents, our results offer evidence that is somewhat at odds with frequently cited anecdotal reports that startups, especially in the software and Internet industries, generally do not use patents to protect against the erosion of their profits. We offer one important caveat, however. A substantial fraction of young firms are apparently opting out of the patent system altogether, and this observation is particularly true of companies in the software and Internet sectors. That said, our findings suggest that patent holding, and the strategic use of patents, is more widespread--even among young software and Internet companies--than commentators have previously reported. Additionally, we find--consistent with anecdotal reports--that many startups rely heavily on patents as signals to the market to improve their chances of raising financing, being acquired, and going public. Our results greatly contrast with previous large-firm studies, however, which showed relatively little reliance on patents for these kinds of signaling. Indeed, our results show that as the patent-holding firms in our sample become older and larger, they tend to rely less on patents as signals. This finding is also important because it lends some empirical support--which had been lacking--for the alternative signaling theories of patents, especially for younger startups. Like large firms, our respondents that hold patents report engaging in strategic patenting to help defend against patent infringement suits and to increase negotiating power, possibly for cross-licensing with other firms. Recognizing that startups--and not just those in the biotechnology field--find the strategic use of patents important is a novel finding. Nonetheless, we show that these young technology companies are especially sensitive to the costs of acquiring and enforcing patents, which--at nearly $40,000 per patent--are roughly double the reported average for all patentees. Thus, even though startup firms are well aware of the strategic uses of patents, resource constraints may mean that fewer of them can engage in these strategies as compared with large incumbents. To the extent that strategic patenting is positively related to firm success and survival, we highlight this finding as a policy concern deserving of further study, especially in industries--like electronics--with large numbers of incumbents engaging in similar strategic patenting

Patenting by Entrepreneurs: An Empirical Study

[T]he Ewing Marion Kauffman Foundation--an organization that studies and promotes entrepreneurship in the United States--funded an effort at the University of California, Berkeley School of Law, to undertake the first comprehensive survey of the relationship between patenting and entrepreneurship in the United States. The authors, along with other investigators, administered the survey in 2008 to approximately 15,000 startup and early-stage companies in the biotechnology, medical device, information technology (IT) hardware, and software and Internet sectors. A portion of the survey examined why entrepreneurs, startups, and early-stage companies do (and do not) seek patents. This Article reports and analyzes results from that survey, showing that several widespread beliefs about startup firm patenting practices are very likely wrong. In brief, like the surveys of large firms, our respondents that hold patents report that the main motivation for patenting is to prevent others from copying their products and services. This result holds--and is statistically valid--across a variety of company characteristics, including firm age, revenues, industry, and patent portfolio size. Because we find that many young technology companies are holding patents, our results offer evidence that is somewhat at odds with frequently cited anecdotal reports that startups, especially in the software and Internet industries, generally do not use patents to protect against the erosion of their profits. We offer one important caveat, however. A substantial fraction of young firms are apparently opting out of the patent system altogether, and this observation is particularly true of companies in the software and Internet sectors. That said, our findings suggest that patent holding, and the strategic use of patents, is more widespread--even among young software and Internet companies--than commentators have previously reported. Additionally, we find--consistent with anecdotal reports--that many startups rely heavily on patents as signals to the market to improve their chances of raising financing, being acquired, and going public. Our results greatly contrast with previous large-firm studies, however, which showed relatively little reliance on patents for these kinds of signaling. Indeed, our results show that as the patent-holding firms in our sample become older and larger, they tend to rely less on patents as signals. This finding is also important because it lends some empirical support--which had been lacking--for the alternative signaling theories of patents, especially for younger startups. Like large firms, our respondents that hold patents report engaging in strategic patenting to help defend against patent infringement suits and to increase negotiating power, possibly for cross-licensing with other firms. Recognizing that startups--and not just those in the biotechnology field--find the strategic use of patents important is a novel finding. Nonetheless, we show that these young technology companies are especially sensitive to the costs of acquiring and enforcing patents, which--at nearly $40,000 per patent--are roughly double the reported average for all patentees. Thus, even though startup firms are well aware of the strategic uses of patents, resource constraints may mean that fewer of them can engage in these strategies as compared with large incumbents. To the extent that strategic patenting is positively related to firm success and survival, we highlight this finding as a policy concern deserving of further study, especially in industries--like electronics--with large numbers of incumbents engaging in similar strategic patenting

Large-scale phenotyping of patients with long COVID post-hospitalization reveals mechanistic subtypes of disease

One in ten severe acute respiratory syndrome coronavirus 2 infections result in prolonged symptoms termed long coronavirus disease (COVID), yet disease phenotypes and mechanisms are poorly understood1. Here we profiled 368 plasma proteins in 657 participants ≥3 months following hospitalization. Of these, 426 had at least one long COVID symptom and 233 had fully recovered. Elevated markers of myeloid inflammation and complement activation were associated with long COVID. IL-1R2, MATN2 and COLEC12 were associated with cardiorespiratory symptoms, fatigue and anxiety/depression; MATN2, CSF3 and C1QA were elevated in gastrointestinal symptoms and C1QA was elevated in cognitive impairment. Additional markers of alterations in nerve tissue repair (SPON-1 and NFASC) were elevated in those with cognitive impairment and SCG3, suggestive of brain–gut axis disturbance, was elevated in gastrointestinal symptoms. Severe acute respiratory syndrome coronavirus 2-specific immunoglobulin G (IgG) was persistently elevated in some individuals with long COVID, but virus was not detected in sputum. Analysis of inflammatory markers in nasal fluids showed no association with symptoms. Our study aimed to understand inflammatory processes that underlie long COVID and was not designed for biomarker discovery. Our findings suggest that specific inflammatory pathways related to tissue damage are implicated in subtypes of long COVID, which might be targeted in future therapeutic trials