Drilldown: Patents

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Patents > Year granted: 1910 - 1919 & Office : CU or FR & Applicant firm: None & National tech categories : FR 20 or USPC 244/153R or USPC 244/3.23 or USPC 244/30 or None & First filing: No

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CPCs:
CPC B64C39/00 (107) · CPC B64C2700/6295 (98) · CPC B64C17/00 (74) · CPC B64C23/005 (45) · CPC B64C3/385 (40) · CPC B64C2700/6274 (36) · CPC B64C33/02 (30) · CPC B64C35/00 (24) · CPC B64C2700/6212 (24) · CPC B64C1/00 (20) · CPC B64C2700/6218 (18) · CPC B64C3/00 (18) · CPC B64C13/00 (17) · CPC B64C2700/6219 (17) · CPC B64C11/006 (15) · CPC B64C2700/6256 (14) · None (14) · CPC B64C2700/6228 (14) · CPC B64C2700/6214 (13)
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