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Patents > Applicant firm: None & Applicant type : INDIV or А. Нейфельд & Tech fields : balloon or wings

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Inventor country:
FR (407) · US (177) · DE (169) · GB (100) · AT (46) · None (44) · HU (37) · RU (36) · IT (30) · BE (22) · CH (22) · ES (14) · AU (14) · RO (12) · AH (9) · Poland (8) · Prussia (7) · DK (6) · NL (6) · BR (5)
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Related to aircraft:
National tech categories:
FR 6.4 (335) · None (265) · FR 6.3 (56) · HU V/h (47) · AT 77d (46) · BE K (44) · DE 77h.5 (25) · DE 77 (20) · IT 8 (14) · USPC 244/30 (13) · DE 77h (12) · DK 77 (12) · RU Group V (12) · GB 4 propel & steer (10) · USPC 244/97 (10) · GB 4 aërostats (8) · GB 4 with buoyant (7) · CH 115 (7) · USPC 244/25 (7) · USPC 244/22 (7)
IPCs:
None (546) · IPC B64B1/00 (82) · IPC B64C39/00 (66) · IPC B64C17/00 (44) · IPC B64C3/00 (41) · IPC B64C1/00 (41) · IPC B64C33/02 (30) · IPC B64C3/38 (26) · IPC B64B1/58 (23) · IPC B64C3/52 (18) · IPC B64C3/54 (18) · IPC B64C23/00 (17) · IPC B64B1/40 (17) · IPC B64C3/56 (15) · IPC B64C13/00 (15) · IPC B64C3/48 (14) · IPC B64C11/00 (14) · IPC B64C33/00 (12) · IPC B64B1/62 (10) · IPC B64C3/14 (9)
CPCs:
None (430) · CPC B64B1/00 (93) · CPC B64C17/00 (49) · CPC B64C39/00 (47) · CPC B64C33/02 (41) · CPC B64C3/00 (41) · CPC B64C2700/6295 (41) · CPC B64B1/40 (36) · CPC B64B1/58 (30) · CPC B64C13/00 (27) · CPC B64C2700/6233 (25) · CPC B64C3/52 (21) · CPC B64C23/005 (21) · CPC B64C2700/6218 (20) · CPC B64C3/385 (19) · CPC B64C3/56 (16) · CPC B64C3/54 (16) · CPC B64B1/62 (16) · CPC B64C33/00 (15) · CPC B64C3/48 (15)
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Citations from after 1930:
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