Drilldown: Patents

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Patents > Tech fields : Flapping or propeller & Number of claims: 2-3

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Office:
Inventors:
None (15) · Christian Lorenzen (5) · Spencer Heath (3) · Jakob Haw (3) · Ludwig Schmidl (3) · Franz Xaver Wels (3) · Philippe Delbert (3)
Inventor country:
Applicant person:
None (77) · Ludwig Schmidl (3) · Franz Xaver Wels (3) · Spencer Heath (3)
Applicant is inventor:
Tech fields: (Click arrow to add another value)
Full specification filed date:
Application number:
None (128)
Granted:
Supplementary to patent:
None (186) · Patent SE-1906-25199 (3) · Patent DE-1913-290120 (3) · Patent DE-1909-11-06 Ludwig Sommer (2) · Patent FR-1908-405961 (2) · Patent FR-1902-328044 (2) · Patent DE-1913-293131 (2) · Patent DE-1913-287314 (2) · Patent FR-1904-340154 (2) · Patent AT-1912-75092 (2)
Related to aircraft:
Patent agent:
None (103) · Victor J. Evans (7) · Munn & Co. (6) · Schwab (5) · Armengaud jeune (3) · J. Bonnet-Thirion (3) · H. C. Everett Co. (3) · E. Blum & Co. (3) · Haseltine, Lake & Co. (3) · Jensen & Son (2) · Marks & Clerk (2) · Hy. Fairbrother (2) · J. G. Lorrain (2) · Abel & Imray (2) · Watson E. Coleman (2) · W. P. Thompson & Co. (2) · C. A. Knowles (2) · Franklin H. Hough (2)
National tech categories:
None (56) · FR 6.4 (28) · AT 77d (16) · DE 77h.6 (13) · HU V/h (8) · USPC 244/28 (6) · DE 77h.10 (6) · GB 4 propel & steer (6) · USPC 244/6 (6) · USPC 244/22 (5) · DE 77h (4) · USPC 244/60 (4) · USPC 244/64 (4) · DE 77h.5 (4) · USPC 244/72 (4) · DE 77 (4)
IPCs:
None (164) · IPC B64B1/00 (9) · IPC B64C33/00 (9) · IPC B64C33/02 (9) · IPC B64C39/00 (6) · IPC B64C11/16 (5) · IPC B64C11/00 (3) · IPC B63H1/12 (3) · IPC B64C23/00 (3) · IPC B64D7/02 (3) · IPC B64C27/00 (2) · IPC B64C11/30 (2) · IPC B64C11/04 (2) · IPC B64C31/04 (2)
CPCs:
None (72) · CPC B64B1/00 (25) · CPC B64C33/02 (21) · CPC B64C23/005 (14) · CPC B64C11/006 (9) · CPC B64C33/00 (7) · CPC B64C39/005 (5) · CPC B64C31/04 (5) · CPC B64D7/02 (4) · CPC B64C3/14 (4) · CPC B64C11/48 (4) · CPC B64C11/16 (4) · CPC B64C11/065 (4) · CPC B64C11/04 (4)
First filing:
Citations from after 1930:
Number of text pages:
Number of claims:
Number of diagram pages:

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