Drilldown: Patents

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Patents > Year granted: 1920 - 1929 & Tech fields : propulsion or None

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Patent agent:
None (327) · Munn & Co. (5) · John P. Tarbox (5) · None (5) · Dom. Casalonga (3) · Armengaud jeune (3) · Dony and Lejeune (2) · F. W. Barker (2) · Warren S. Ostow (2) · P. Degroote (2) · M. Zerolo (2)
IPCs:
None (292) · IPC B64C11/00 (7) · IPC B64C17/00 (6) · IPC B64C39/00 (6) · IPC B64C35/00 (6) · IPC B64C23/00 (6) · IPC B64C3/00 (6) · IPC B64C27/04 (4) · IPC B64C3/38 (4) · IPC B64C25/00 (3) · IPC B64C29/00 (3) · IPC B64C1/00 (3) · IPC B64C3/54 (3) · IPC F03D3/06 (3) · IPC B64C11/20 (3) · IPC B64C11/36 (2) · IPC B64D27/00 (2) · IPC B64C13/00 (2) · IPC B64C27/10 (2) · IPC B64C11/22 (2)
CPCs:
CPC B64C3/00 (28) · CPC B64C17/00 (25) · CPC B64C39/00 (25) · CPC B64C2700/6295 (24) · None (20) · CPC B64C23/005 (20) · CPC B64C2700/6233 (17) · CPC B64C13/00 (14) · CPC B64C2700/6256 (13) · CPC B64C2700/6274 (13) · CPC B64C2700/6212 (12) · CPC B64C2700/6235 (11) · CPC B64C11/04 (10) · CPC B64C3/385 (9) · CPC B64C35/00 (9) · CPC B64C3/185 (8) · CPC B64C2001/0081 (8) · CPC B64C1/00 (8) · CPC B64B1/00 (8)
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