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B21F

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Ranked by the PatentIndex Score — a 1–99 percentile within B21F · public-visibility date · generated 2026

Rising· last 2 yrs

Inventors whose newest B21F patents became public in the last 2 years — the current frontier

  1. 199Douglas Brandt6 patents · 343 citations
  2. 296Rick M. Matty6 patents · 343 citations
  3. 392Osamu Itagaki29 patents · 68 citations
  4. 488Akira Kasahara20 patents · 27 citations
  5. 583Takeshi Morijiri16 patents · 13 citations
  6. 679Klaus-Friedrich Grubert5 patents · 9 citations
  7. 775Norihiro Nagai6 patents · 9 citations
  8. 871Felix L. Sorkin6 patents · 0 citations
  9. 967Seung Min Choi3 patents · 4 citations
  10. 1063Heinz Rhyner2 patents · 3 citations
  11. 1158Mario Reut2 patents · 3 citations
  12. 1254Shinpei Sugihara10 patents · 0 citations
  13. 1350Alexej Butov2 patents · 2 citations
  14. 1446Anna-Katharina Schreiner2 patents · 2 citations
  15. 1542Benjamin Nichols2 patents · 2 citations
  16. 1638John J. Meyer2 patents · 2 citations
  17. 1733Marcel Purrio2 patents · 2 citations
  18. 1829Theodor Wenniges2 patents · 2 citations
  19. 1925Jonathan T. Slocum1 patents · 2 citations
  20. 2021Masato Utsugi3 patents · 0 citations
  21. 2117Brian Gaffney2 patents · 0 citations
  22. 2213James J. Scutti2 patents · 0 citations
  23. 238Rachel M. Williams2 patents · 0 citations
  24. 244Philip N. Sabes2 patents · 0 citations
  25. 251Timothy L. Hanson2 patents · 0 citations

Active· last 5 yrs

Sustained B21F output across the last 5 years

  1. 199Neill Hamilton Luebke14 patents · 107 citations
  2. 296Douglas Brandt6 patents · 343 citations
  3. 392Rick M. Matty6 patents · 343 citations
  4. 488Robert E. Isaacs6 patents · 165 citations
  5. 583Osamu Itagaki29 patents · 68 citations
  6. 679Ichiro Kusakari13 patents · 58 citations
  7. 775Akira Kasahara20 patents · 27 citations
  8. 871Takahiro Nagaoka11 patents · 41 citations
  9. 967Takeshi Morijiri16 patents · 13 citations
  10. 1063Anna G. U. S. Newcomb4 patents · 26 citations
  11. 1158Philip M. Reyes4 patents · 26 citations
  12. 1254Seungwon Baek4 patents · 26 citations
  13. 1350Klaus-Friedrich Grubert5 patents · 9 citations
  14. 1446William Henry Ollis4 patents · 21 citations
  15. 1542Tadasuke Matsuno8 patents · 10 citations
  16. 1638Takanori Ban4 patents · 9 citations
  17. 1733Loren R. Graber3 patents · 12 citations
  18. 1829Wendell J. Miller3 patents · 12 citations
  19. 1925Norihiro Nagai6 patents · 9 citations
  20. 2021Frank Weiblen4 patents · 12 citations
  21. 2117Frank A. Ciapala5 patents · 3 citations
  22. 2213Jeffrey M. Handel5 patents · 3 citations
  23. 238Christian Charbon8 patents · 10 citations
  24. 244Abraham Sacks2 patents · 44 citations
  25. 251William Spilchen2 patents · 44 citations

All-time canon

Career PatentIndex Score in B21F

  1. 199Timothy J. Claude24 patents · 3,706 citations
  2. 296Curtis Amplatz6 patents · 3,881 citations
  3. 392Dominik M. Wiktor11 patents · 5,032 citations
  4. 488Andrew J. Denardo7 patents · 1,335 citations
  5. 583Lok A. Lei5 patents · 924 citations
  6. 679Cesare Gianturco4 patents · 4,518 citations
  7. 775Friedrich Riemeier13 patents · 817 citations
  8. 871Werner Butscher13 patents · 817 citations
  9. 967Alvin E. Reynolds7 patents · 607 citations
  10. 1063Andrew Cordell5 patents · 194 citations
  11. 1158Christoph Radinger5 patents · 194 citations
  12. 1254James J. Rudnick4 patents · 624 citations
  13. 1350Neill Hamilton Luebke14 patents · 107 citations
  14. 1446Edward L. Gibbs5 patents · 153 citations
  15. 1542Gregory Pinchasik4 patents · 339 citations
  16. 1638George R. Proto5 patents · 401 citations
  17. 1733Richard F. Gladney5 patents · 153 citations
  18. 1829Thomas C. Adams6 patents · 197 citations
  19. 1925Ichiro Itaya18 patents · 304 citations
  20. 2021Douglas Brandt6 patents · 343 citations
  21. 2117Rick M. Matty6 patents · 343 citations
  22. 2213John Skelton3 patents · 1,616 citations
  23. 238Robert B. Davis3 patents · 1,616 citations
  24. 244Robert E. Isaacs6 patents · 165 citations
  25. 251Thomas J. Wells11 patents · 160 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth