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Patents > Tech fields : covering or propeller & Number of diagram pages: 1-2

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None (432) · England (7) · Berlin (6) · Seine (5) · Nord (5) · Los Angeles (5) · Pennsylvania (4) · Ohio (4) · Brooklyn (3) · Panama Canal Zone (3) · NY (3) · New York state (3) · New York city (3) · New York (3) · New Jersey (3) · Derbyshire (3) · Zurich (3) · Balboa (3)
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None (426) · Patent DE-1899-123884 (4) · Patent FR-1904-340154 (4) · Patent GB-1909-12556 (4) · Patent FR-1909-410140 (4) · Patent US-1915-1217790 (3) · Patent DE-1893-73799 (3) · Patent DE-1917-305040 (3) · Patent US-1906-850616 (3) · Patent FR-1908-405961 (3) · Patent DE-1913-290120 (3)
Related to aircraft:
Patent agent:
None (218) · None (12) · Munn & Co. (12) · Victor J. Evans (7) · Armengaud jeune (6) · Haseltine, Lake & Co. (6) · J. Bonnet-Thirion (5) · W. P. Thompson & Co. (5) · Schwab (5) · Abel & Imray (5) · E. Imer-Schneider (4)
National tech categories:
None (185) · FR 6.4 (56) · DE 77h.6 (50) · AT 77d (23) · DE 77 (17) · FR 6.2 (9) · DE 77h (8) · DE 77h.5 (8) · RU Group V (7) · USPC 244/51 (6) · CH 129b (6) · USPC 244/22 (6) · AU 90.3 (5) · AU 90.5 (5) · USPC 244/13 (5) · USPC 244/66 (5) · USPC 244/6 (5) · CH 115 (5) · USPC 244/30 (5)
IPCs:
None (327) · IPC B64C11/16 (21) · IPC B64B1/00 (20) · IPC B64C11/00 (17) · IPC B64C11/04 (14) · IPC B64C23/00 (12) · IPC B64C39/00 (9) · IPC B64C11/36 (9) · IPC B64C11/34 (8) · IPC B64C11/20 (7) · IPC B64C27/04 (6) · IPC B64C9/00 (6) · IPC B64B1/58 (6) · IPC B64C27/00 (5) · IPC B64C29/00 (4) · IPC B64C11/06 (4) · IPC B64C11/30 (4) · IPC B63H1/12 (4)
CPCs:
None (141) · CPC B64B1/00 (31) · CPC B64C11/006 (31) · CPC B64C23/005 (25) · CPC B64C11/16 (21) · CPC B64C11/36 (20) · CPC B64C11/04 (18) · CPC B64C11/48 (14) · CPC B64C2700/6295 (10) · CPC B64C11/343 (10) · CPC B64C33/02 (9) · CPC B64C11/065 (9) · CPC B64C39/005 (8) · CPC B64C27/54 (8) · CPC B64C11/00 (8)
First filing:
Citations from after 1930:
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