Topic leaderboard

F21S

Non-portable lighting devices & systems

Ranked by the PatentIndex Score — a 1–99 percentile within F21S · public-visibility date · generated 2026

top 25 per window · public-visibility date

Rising· last 2 yrs

Inventors whose newest F21S patents became public in the last 2 years — the current frontier

199Ha Tran27 patents · 510 citations
296Louis Lerman78 patents · 1,311 citations
392Robert V. Steele46 patents · 1,084 citations
488Wilson Dau59 patents · 793 citations
583Michael D. Danesh42 patents · 1,767 citations
679George Lerman36 patents · 563 citations
775Jacqueline Teng36 patents · 563 citations
871Ignazio Gallo10 patents · 556 citations
967Bruce Quaal25 patents · 675 citations
1063Voravit Puvanakijjakorn25 patents · 270 citations
1158Chi Yin Alan Leung27 patents · 268 citations
1254Chi Kin Samuel Kwok21 patents · 259 citations
1350Ricky Tong18 patents · 217 citations
1446Chang-Jun He13 patents · 200 citations
1542Srinath K. Aanegola11 patents · 387 citations
1638David E. Doubek13 patents · 583 citations
1733Derek E. Logan11 patents · 585 citations
1829Brian Halliwell51 patents · 493 citations
1925Richard S. Belliveau22 patents · 394 citations
2021Daniel S. Spiro62 patents · 295 citations
2117Pierre Albou84 patents · 633 citations
2213Robert Fraizer18 patents · 237 citations
238Jyoti Kumar16 patents · 214 citations
244Howard Yaphe58 patents · 363 citations
251Alan Barry Feit37 patents · 222 citations

Active· last 5 yrs

Sustained F21S output across the last 5 years

199John Ivey39 patents · 1,820 citations
296Ha Tran27 patents · 510 citations
392Michael V. Recker20 patents · 1,034 citations
488Louis Lerman78 patents · 1,311 citations
583Tseng-Lu Chien159 patents · 2,888 citations
679Robert V. Steele46 patents · 1,084 citations
775Scott D. Johnston14 patents · 1,152 citations
871Steve T. Kondo14 patents · 1,152 citations
967George R. Hulse21 patents · 1,240 citations
1063Wilson Dau59 patents · 793 citations
1158Brian D. Ogonowsky20 patents · 860 citations
1254Michael D. Danesh42 patents · 1,767 citations
1350George Lerman36 patents · 563 citations
1446Jacqueline Teng36 patents · 563 citations
1542Ken Czech17 patents · 805 citations
1638Neal R. Verfuerth30 patents · 1,276 citations
1733Steven Walter Pyshos36 patents · 747 citations
1829Ignazio Gallo10 patents · 556 citations
1925Joseph P. Chobot10 patents · 420 citations
2021Robert C. Gardner18 patents · 521 citations
2117Basar Erdener21 patents · 315 citations
2213Dan Hero De Guzman Cajumban6 patents · 295 citations
238Bruce Quaal25 patents · 675 citations
244Voravit Puvanakijjakorn25 patents · 270 citations
251Chi Yin Alan Leung27 patents · 268 citations

All-time canon

Career PatentIndex Score in F21S

199George G. Mueller24 patents · 16,963 citations
296John K. Roberts17 patents · 4,901 citations
392Joseph S. Stam9 patents · 2,403 citations
488Frederick T. Bauer8 patents · 2,197 citations
583Jean C. Raymond19 patents · 1,051 citations
679Jos Timmermans19 patents · 1,051 citations
775Stephen J. Mcphilliamy10 patents · 1,112 citations
871John Ivey39 patents · 1,820 citations
967Desaraju V. Varaprasad11 patents · 748 citations
1063Ian A. Mccabe11 patents · 748 citations
1158Simon H. A. Begemann7 patents · 1,862 citations
1254Ha Tran27 patents · 510 citations
1350Lois Bauer5 patents · 1,246 citations
1446Tatsumi Setomoto17 patents · 849 citations
1542Tetsushi Tamura7 patents · 847 citations
1638Brian Roberge8 patents · 1,618 citations
1733Michael V. Recker20 patents · 1,034 citations
1829Joel M. Dry7 patents · 644 citations
1925Louis Lerman78 patents · 1,311 citations
2021Tseng-Lu Chien159 patents · 2,888 citations
2117Robert V. Steele46 patents · 1,084 citations
2213Dennis Siemiet5 patents · 886 citations
238Scott D. Johnston14 patents · 1,152 citations
244Steve T. Kondo14 patents · 1,152 citations
251Kingsley Chan9 patents · 1,035 citations

90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth