Drilldown: Patents

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Patents > Inventor country : RO or None & Filing date: 1900 - 1999 & IPCs: None

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Inventor country: (Click arrow to add another value)
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Tech fields:
None (519) · airplane (39) · propulsion (29) · propellers (19) · stability (18) · design (17) · LTA (17) · navigation (13) · wings (13) · frame (12) · control (12) · aerodynamics (10) · construction (9) · balloons (9) · propeller (8) · balloon (7) · subsystem (7) · airship (5) · rudder (5) · safety (5)
Full specification filed date:
Application number:
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National tech categories:
None (598) · BE K (15) · HU V/h (10) · IT 8 (5) · DE 77h.5 (4) · DE 77h (4) · AT 77d (4) · AR 21 (3) · USPC 244/147 (2) · AR vehicles (2)
IPCs: (Click arrow to add another value)
CPCs:
None (303) · CPC B64C39/00 (27) · CPC B64C2700/6295 (26) · CPC B64C3/00 (25) · CPC B64C17/00 (18) · CPC B64C23/005 (16) · CPC B64C11/006 (16) · CPC B64C2700/6233 (16) · CPC B64C13/00 (15) · CPC B64C35/00 (14) · CPC B64C3/18 (13) · CPC B64C2700/6256 (12) · CPC B62C5/04 (11) · CPC B64C2700/6274 (11) · CPC B64F2700/6261 (10) · CPC B64C2700/6212 (10) · CPC B64C33/00 (10) · CPC B64C3/385 (9) · CPC B64C2700/6235 (9)
First filing:
Cites these patents:
Citations from after 1930:
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