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Patents > Patent agent : J. Warner Backstrom? or None or Victor J. Evans

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Tech fields:
airplane (94) · None (66) · stability (66) · frame (46) · Propulsion (43) · LTA (33) · Design (32) · navigation (30) · wings (29) · propellers (29) · construction (26) · hybrid (24) · control (23) · rudder (21) · Propeller (20) · helicopter (17) · Automatic stability (15) · Aerodynamics (15) · landing (13) · Flapping (13)
Full specification filed date:
Application number:
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Supplementary to patent:
None (357) · Patent FR-1916-501550 (8) · Patent FR-1912-446040 (4) · Patent FR-1915-478440 (3) · Patent FR-1908-394418 (3) · Patent FR-1908-397675 (2) · Patent FR-1911-431131 (2) · Patent FR-1905-356644 (2) · Patent FR-1907-385107 (2)
Related to aircraft:
Patent agent: (Click arrow to add another value)
National tech categories:
FR 6.4 (171) · None (99) · FR 12.2 (10) · FR 6.3 (9) · USPC 244/45R (8) · USPC 244/80 (8) · FR 5.8 (6) · FR 20.1 (6) · FR 6.2 (5) · USPC 244/119 (5) · USPC 244/35R (4) · USPC 244/104R (4)
IPCs:
None (132) · IPC B64C17/00 (34) · IPC B64C39/00 (31) · IPC B64C1/00 (29) · IPC B64B1/00 (18) · IPC B64C33/02 (11) · IPC B64C3/38 (11) · IPC B64C23/00 (11) · IPC B64C3/00 (11) · IPC B64C11/00 (10) · IPC G01S1/72 (10) · IPC B64C27/04 (8) · IPC B64C3/18 (8) · IPC B64D17/00 (7) · IPC B64C3/52 (6) · IPC B64C3/54 (6) · IPC B64C1/06 (6) · IPC B64C33/00 (5) · IPC B64C31/06 (5) · IPC B64B1/58 (5)
CPCs:
CPC B64C17/00 (48) · CPC B64B1/00 (24) · None (21) · CPC B64C39/00 (21) · CPC B64C2700/6295 (20) · CPC B64C23/005 (19) · CPC B64C33/02 (16) · CPC B64C3/385 (13) · CPC B64C39/08 (12) · CPC B64C2700/6218 (12) · CPC G01S1/72 (10) · CPC B64C11/006 (10) · CPC B64C3/00 (9) · CPC B64C1/00 (8) · CPC B64C13/00 (8) · CPC B64C17/06 (8)
First filing:
Citations from after 1930:
Number of text pages:
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