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PatentWorld
Chapter 16

Gender and Patenting

Gender composition and the gender innovation gap

Note: Lifetime citation rankings (all-male 14.2, mixed 12.6, all-female 9.5) reflect patents with complete citation windows. Recent-year figures use truncated citation windows and may show different patterns.

Gender is one of the most fundamental dimensions along which the inventor workforce can be disaggregated. This chapter examines how female participation in patenting has evolved over time, how it varies across technology fields, and what differences emerge in patent quality by team gender composition.

Progress on gender diversity has been measurable but slow, with female representation varying widely across technology fields in patterns that mirror the composition of STEM educational pipelines. Understanding these patterns is essential to evaluating the inclusiveness and representativeness of the patent system.

Gender Composition

Figure 1

Female Inventor Share Rose Steadily From 2.8% in 1976 to 14.9% in 2025 (Through September)

Percentage of inventor-patent instances attributed to female inventors, measured annually, 1976–2025

The figure tracks the percentage of inventor-patent instances attributed to female inventors over time. The data demonstrate a consistent upward trend from 2.8% in 1976 to 14.9% in 2025 (Through September), an increase of 5.3-fold over the study period.
The persistent gender gap in patenting is consistent with broader structural differences in STEM participation, including educational pipelines, workplace composition, and institutional factors.

Progress on gender diversity in patenting has been measurable but gradual. The female share increased from 2.8% in 1976 to 14.9% in 2025 (Through September). Despite decades of initiatives to broaden participation in STEM, the female share of inventors on US patents remains at approximately 15%. Multiple structural factors — including differences in STEM pipeline participation, industry composition, and institutional barriers — may contribute to these patterns. At the observed rate of change, achieving equal representation would require several additional decades.

The Gender Innovation Gap

Disaggregating further beyond aggregate gender trends reveals substantive differences in the technology areas where women innovate and the performance of gender-diverse teams.

Figure 2

Female Inventor Shares Range From 8.2% (Fixed Constructions) to 23.4% (Chemistry) Across CPC Sections

Female inventor share by CPC section and 5-year period, showing technology-specific gender variation over time

The figure displays the percentage of inventors who are female within each CPC section, measured in 5-year periods. Chemistry and Human Necessities consistently exhibit the highest female representation, while Fixed Constructions and Mechanical Engineering demonstrate the lowest.
The technology-specific gender gap mirrors the composition of STEM degree pipelines. Fields with higher female enrollment, such as chemistry and life sciences, demonstrate correspondingly higher female inventor representation.

Quality Metrics — Women versus Men Inventors

The following charts compare seven patent quality indicators and one productivity measure across team gender compositions over time. All-female teams, all-male teams, and mixed-gender teams are tracked separately, while individual inventor productivity is compared between female and male inventors.

Figure 3

Recent Cohorts Show Higher Raw Citation Counts for All-Female Teams (1.06 in 2024 versus 0.51 for All-Male), Though Truncation Limits Interpretation (Recent Cohorts; Citation Window Incomplete)

Average forward citations per patent by team gender composition, 1976–2025

Average forward citations received per patent by team gender composition, 1976–2025. Recent years are truncated due to citation lag. Data: PatentsView. The directional reversal compared with cumulative averages (where all-male teams lead at 14.2) reflects citation truncation: 2024 patents have accumulated fewer than two years of citations, a window too short to reveal long-run impact differences.
Figure 4

Mixed-Gender Teams File Patents with 16.0 Claims on Average, versus 10.6 for All-Female Teams

Average number of claims per patent by team gender composition, 1976–2025

Average number of claims per patent by team gender composition, 1976–2025. Mixed-gender teams consistently file the broadest claims. Data: PatentsView.
Figure 5

Mixed-Gender Teams Average 2.49 CPC Subclasses per Patent, versus 2.29 for All-Female Teams

Average patent scope (CPC subclass count) by team gender composition, 1976–2025

Average number of distinct CPC subclasses per patent by team gender composition, 1976–2025. Higher values indicate broader technological scope. Data: PatentsView.
Figure 6

All-Male Teams Score 0.198 on Originality, Above Mixed Teams' 0.195 and All-Female Teams' 0.157

Average originality index by team gender composition, 1976–2025

Average originality index (Herfindahl-based dispersion of backward citation technology classes) by team gender composition, 1976–2025. Data: PatentsView.
Figure 7

Mixed-Gender Teams Score 0.037 on Generality, Nearly Double All-Female Teams' 0.022

Average generality index by team gender composition, 1976–2025

Average generality index (Herfindahl-based dispersion of forward citation technology classes) by team gender composition, 1976–2025. Data: PatentsView.
Figure 8

Mixed-Gender Teams Self-Cite at 15.7%, versus 12.0% for All-Male and 9.9% for All-Female Teams

Average self-citation rate by team gender composition, 1976–2025

Average self-citation rate (share of backward citations to the same assignee's patents) by team gender composition, 1976–2025. Data: PatentsView.
Figure 9

Mixed-Gender Teams Wait 1,027 Days for Grant, versus 886 Days for All-Female Teams

Average grant lag in days by team gender composition, 1976–2025

Average number of days from filing to grant by team gender composition, 1976–2025. Grant lag has increased for all groups over time. Data: PatentsView.
Figure 10

Average Patent Output Is 2.0 per Male Inventor versus 1.9 per Female Inventor (2024)

Average patents per inventor by gender, 1976–2025

Average number of patents per inventor per year by gender, 1976–2025. Data: PatentsView.

Female Inventor Share by Filing Route

The gender composition of the inventor workforce may differ between patents filed through domestic routes and those originating from foreign applicants. Comparing female inventor share across filing routes reveals whether the gender gap varies by the geographic origin of patent applications.

Figure 11

Foreign-Origin Patents Show 16.5% Female Inventor Share versus 13.8% for Domestic in 2025 (Through September)

Female inventor share by filing route (domestic versus foreign-origin patents), 1976–2025

The figure tracks the female inventor share separately for patents filed through domestic routes and those originating from foreign applicants. Foreign-origin patents have overtaken domestic patents in female inventor share since 2010, a reversal of the pattern observed in earlier decades.
The crossover in female inventor share around 2010 — where foreign-origin patents surpassed domestic patents — may reflect field-composition differences in the types of patents filed through foreign versus domestic routes, though it is also consistent with differing rates of change in female STEM participation across countries.

The gender composition of the inventor workforce reveals persistent disparities across technology fields and meaningful differences in patent quality by team composition. The next chapter, Team Size and Collaboration, examines how team structures have evolved over time and how team size relates to patent quality and innovation outcomes.

Data coverage: January 1976 through September 2025. All 2025 figures reflect partial-year data.