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Patents > Year granted: 1920 - 1929 & National tech categories : GB 4 propel & steer or None

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None (361) · New York state (7) · Indiana (7) · Pennsylvania (7) · Chicago (4) · Los Angeles (4) · New York City (4) · New York county (4) · Ohio (4) · New York (3) · Oklahoma (3) · FIPSloc=36061 (3) · Michigan (3)
Applicant firm:
None (320) · Curtiss Aeroplane (21) · Westinghouse Electric & Manufacturing Company (9) · Sperry Gyroscope Company (5) · Société Anonyme des Établissements Nieuport (5) · Société des Avions Louis Bréguet (4) · Moteurs Salmson (4) · Tarbox Safety Aircraft Company (3) · Grand Rapids Trust Company (2) · Vickers (2) · Société anonyme Astra AB (2) · Ordnance Engineering Corp. (2) · L W F Engineering Company (2) · John A. Roebling's Sons (2) · Haskelite Manufacturing Corporation (2) · Curtiss Aeroplane and Motor Corporation (2) · Ballonhüllen Gesellschaft m.b.H. mit Beschränkter Haftung (2) · AGO Flugzeugwerke G. m. b. H. (2)
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Supplementary to patent:
None (380) · Patent GB-1917-126391 (2) · Patent CA-1918-196108 (2) · Patent FR-1915-477457 (2)
Related to aircraft:
Patent agent:
None (231) · John P. Tarbox (21) · None (9) · Herbert H. Thompson (6) · Marks & Clerk (6) · Munn & Co. (5) · Joseph F. O'Brien (4) · Kerr, Page, Cooper & Haywood (4) · N. S. Amstutz (4) · Joshua R. H. Potts (3) · 0 (3) · Chappell & Earl (3)
National tech categories: (Click arrow to add another value)
IPCs:
None (217) · IPC B64C3/00 (19) · IPC B64C39/00 (12) · IPC B64C23/00 (10) · IPC B64C35/00 (10) · IPC B64C11/04 (9) · IPC B64C17/00 (8) · IPC B64C1/00 (8) · IPC B64C11/36 (8) · IPC B64C3/18 (7) · IPC B64C11/20 (7) · IPC B64C25/00 (7) · IPC B64C3/38 (6) · IPC B64C13/12 (5) · IPC B64C3/50 (4) · IPC B64C13/00 (4) · IPC B64C33/00 (4) · IPC B64C11/00 (4)
CPCs:
CPC B64C3/00 (35) · CPC B64C17/00 (24) · CPC B64C39/00 (19) · None (18) · CPC B64C2700/6295 (17) · CPC B64C2700/6235 (15) · CPC B64C2700/6233 (15) · CPC B64C23/005 (15) · CPC B64C13/00 (15) · CPC B64C11/04 (14) · CPC B64C2700/6256 (14) · CPC B64C2001/0081 (12) · CPC B64C35/00 (11) · CPC B64C2700/6212 (10) · CPC B64C3/18 (10) · CPC B64C11/20 (9) · CPC B64C1/00 (9)
First filing:
Citations from after 1930:
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