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Patents > Inventor country: None & National tech categories : GB 4 propel & steer or None

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Inventor country: (Click arrow to add another value)
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Supplementary to patent:
None (2053) ·   (5) · Patent FR-1880-139386 (2) · Patent BE-1913-253298 (2)
Related to aircraft:
Patent agent:
None (2039) · Boult, Wade & Tennant (3) · Marks & Clerk (3) · None (3) · J.H. Johnson (2) · Casalonga (2) · Alfred Julius Boult (2)
National tech categories: (Click arrow to add another value)
IPCs:
None (2047) · IPC B64C39/00 (10) · IPC B64C23/00 (5) · IPC B64C17/00 (2) · IPC B64C27/08 (2) · IPC B64C33/02 (2) · IPC B64C11/00 (2) · IPC B64C5/04 (2)
CPCs:
None (1345) · CPC B64C11/006 (110) · CPC B64C11/346 (65) · CPC B64C11/48 (50) · CPC Y02E10/722 (31) · CPC F03D11/00 (31) · CPC B63H1/12 (31) · CPC B64C11/343 (30) · CPC F05B2260/74 (28) · CPC B64C11/36 (28) · CPC B64C11/06 (26) · CPC B63H1/04 (25) · CPC B64C2700/6295 (21) · CPC B64C3/00 (20) · CPC B64C39/00 (20) · CPC B64C27/33 (19) · CPC F03D1/025 (17) · CPC B64C3/48 (15)
First filing:
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