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Patents > Applicant firm: None & Supplementary to patent: None & Citations from after 1930: 1-2

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None (436) · New York (6) · Pennsylvania (6) · Seine (6) · London (5) · Cleveland (4) · Ohio (4) · Allegheny county, Pennsylvania (3) · Los Angeles (3) · Indiana (3) · PA (3) · St. Louis (3) · Philadelphia (3)
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Tech fields:
None (139) · propeller (54) · Airplane (53) · stability (53) · LTA (47) · propulsion (47) · frame (40) · navigation (35) · rudder (22) · helicopter (21) · parachute (21) · marine (20) · control (19) · safety (17) · car (17) · wheels (17) · aerial propeller (16) · ornithopter (13)
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None (510)
National tech categories:
None (227) · FR 6.4 (50) · USPC 244/45R (9) · USPC 244/3.23 (9) · USPC 244/80 (9) · USPC 244/119 (9) · USPC 244/22 (8) · USPC 244/64 (7) · USPC 244/177 (6) · USPC 244/90R (6) · USPC 244/66 (5) · USPC 244/20 (5) · USPC 244/6 (5)
IPCs:
None (328) · IPC B64B1/00 (16) · IPC B64C39/00 (15) · IPC B64C3/00 (15) · IPC B64C1/00 (13) · IPC B64C23/00 (11) · IPC B64C33/02 (9) · IPC B64C3/38 (9) · IPC B64C17/00 (9) · IPC B64C3/54 (8) · IPC B64C33/00 (7) · IPC B64C35/00 (6) · IPC F42B10/00 (5) · IPC B64C31/06 (5) · IPC B64C3/18 (4) · IPC B64B1/62 (4) · IPC B64C25/00 (4)
CPCs:
CPC B64C23/005 (29) · CPC B64B1/00 (27) · CPC B64C17/00 (27) · CPC B64C33/02 (22) · CPC B64C3/385 (22) · CPC B64C3/00 (19) · CPC B64C27/54 (19) · CPC B64C2700/6295 (19) · CPC B64C39/005 (18) · CPC B64C11/48 (17) · CPC B64C13/00 (17) · CPC B64C11/006 (15) · CPC B64C39/08 (13) · None (12) · CPC B64C11/36 (11) · CPC B64C35/00 (10) · CPC B64C11/04 (10)
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