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Patents > Applicant person : DOUGLAS Clark WILLIAM or None & Family year: 1800 - 1899

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Tech fields:
None (751) · LTA (260) · navigation (186) · propulsion (156) · balloon (133) · propeller (55) · frame (50) · marine (43) · stability (31) · car (31) · military (26) · rudder (24) · airplane (24) · flapping (24) · whole (23) · safety (22) · parachute (22) · electricity (17) · projectile (16) · dirigible (16)
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Supplementary to patent:
None (1367) · Patent FR-1899-Boinet (2) · Patent FR-1891-217128 (2) · Patent FR-1841-9265 (2) · Patent FR-1897-271948 (2) · Patent DE-1894-76727 (2) · Patent GB-1885-339 (2) · Patent US-1892-502168 (2) ·   (2) · Patent US-1890-432860 (2)
Related to aircraft:
Patent agent:
None (1299) · Munn & Co. (8) · Blétry aîné (7) · Dieuaide (6) · Desnos (6) · Armengaud jeune (6) · Chassevent (5) · 1 (4) · Fayollet (4) · Haseltine, Lake & Co. (3) · Dumas (3) · Armengaud aîné (3)
National tech categories:
None (1039) · FR 6.3 (138) · FR 5 (58) · DE 77 (31) · GB 4 propel & steer (18) · GB 4 with buoyant (17) · GB 4 without buoyant (16) · FR 6.4 (14) · USPC 244/3.23 (11) · FR 6 (8) · GB 4 aërostats (7) · GB 4 (7) · GB 4 aëroplanes (5) · DE 77h (5) · USPC 244/28 (5) · USPC 244/64 (4) · GB 123 aero steam generators (4) · GB 122 aero steam engines (4) · GB 4 motors (4) · USPC 244/30 (4)
IPCs:
None (1391) · IPC B64B1/00 (8) · IPC B64C33/02 (3) · IPC B64C31/06 (3) · (IPC1-7) B64B (2) · IPC B64C39/008 (2) · IPC B64C9/00 (2) · IPC B64C9/38 (2) · IPC B64C11/00 (2) · IPC B64B1/58 (2) · IPC B64C31/00 (2)
CPCs:
None (761) · CPC B64C11/006 (126) · CPC B64C11/346 (69) · CPC B64C11/48 (62) · CPC B64C11/36 (44) · CPC B63H1/12 (42) · CPC F05B2260/74 (36) · CPC F03D11/00 (34) · CPC B64C11/343 (33) · CPC Y02E10/722 (33) · CPC B63H1/04 (30) · CPC B64C11/06 (28) · CPC B64C27/33 (21) · CPC B64B1/00 (19) · CPC B64C3/48 (19) · CPC F03D1/025 (17) · CPC B64C11/065 (17) · CPC Y02E10/74 (15) · CPC F03D3/00 (15) · CPC Y02E10/72 (14)
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Citations from after 1930:
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