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Patents > Tech fields : Airship or stability & National tech categories : FR 6.4 or USPC 244/22

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Supplementary to patent:
None (339) · Patent FR-1909-410140 (6) · Patent DE-1911-11-16 Otto Albin Budig (3) · Patent FR-1907-373818 (3) · Patent FR-1908-401308 (3)
Related to aircraft:
Patent agent:
None (109) · Armengaud jeune (61) · None (30) · E. Blétry (22) · Lavoix et Moses (21) · J. Bonnet-Thirion (14) · Schwab (14) · J. Germain (14) · L. Chassevent (10) · Charles Dony (10) · H. Bœttcher fils (10) · Hippolyte Josse (10) · De Bongé (7) · Dupont et Elluin‎ (6) · Weismann et Marx (6) · Brandon frères (6)
National tech categories: (Click arrow to add another value)
IPCs:
IPC B64C17/00 (235) · IPC B64C1/00 (186) · IPC B64C39/00 (39) · None (37) · IPC B64C17/06 (28) · IPC B64B1/00 (27) · IPC B64B1/58 (16) · IPC B64C13/00 (11) · IPC B64B1/40 (11) · IPC B64C3/38 (10) · IPC B64C23/00 (10) · IPC B64C11/00 (6) · IPC B64C33/00 (6) · IPC B64C3/54 (5) · IPC B64C13/04 (5) · IPC B64C25/00 (5) · IPC B64B1/62 (5) · IPC B64C31/06 (4) · IPC CPC B64C13/00 (4) · IPC B64C33/02 (4)
CPCs:
CPC B64C17/00 (250) · CPC B64C2700/6218 (100) · CPC B64C2700/6212 (53) · CPC B64C39/00 (34) · CPC B64C17/06 (33) · CPC B64C2700/6214 (32) · CPC B64B1/00 (27) · CPC B64C2700/6295 (25) · CPC B64C2700/6216 (25) · CPC B64C2700/6219 (23) · CPC B64C1/00 (23) · CPC B64C13/00 (17) · CPC B64B1/58 (16) · CPC B64C2700/6256 (14) · CPC B64C33/02 (12) · CPC B64C3/385 (12) · CPC B64C2700/6215 (10) · CPC B64B1/40 (10) · CPC B64C2700/6228 (10) · CPC B64C23/005 (9)
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