Drilldown: Patents

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Patents > Office: FR & Tech fields : Airplane or hybrid or safety or None & Grant date: 1910 - 1919 & National tech categories : AT 77d or DE 77 or FR 6.2 or None

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CPCs:
CPC B64C39/00 (108) · CPC B64C2700/6295 (100) · CPC B64C17/00 (86) · CPC B64C23/005 (45) · CPC B64C3/385 (41) · CPC B64C2700/6274 (36) · CPC B64C33/02 (32) · CPC B64C35/00 (26) · CPC B64C2700/6212 (26) · CPC B64C2700/6218 (23) · CPC B64C3/00 (22) · CPC B64C2700/6219 (21) · CPC B64C1/00 (21) · CPC B64C13/00 (20) · CPC B64C11/006 (18) · CPC B64C2700/6256 (17) · CPC B64C2700/6228 (15) · CPC B64C2700/6214 (14) · CPC B64C33/00 (13) · None (13)
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