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Patents > Year filed: 1913 & Tech fields : Hybrid or None

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None (301) · None (6) · W. P. Thompson & Co. (4) · L. Chassevent (3) · Weismann et Marx (3) · Munn & Co. (2) · J. S. Withers & Spooner (2) · Herbert Haddan & Co. (2) · A. Wunderlich & Cie, Ingénieurs-Conseils (2) · Rigot et Prévost (2) · Émile Bert (2) · Victor J. Evans (2) · Verhaeghen (2) · H. Boettcher fils (2)
National tech categories:
None (245) · FR 6.4 (32) · USPC 244/90R (6) · BE K (6) · USPC 244/119 (5) · USPC 244/101 (5) · USPC 244/233 (5) · USPC 244/45R (3) · USPC 244/23R (3) · USPC 244/93 (3) · USPC 244/47 (3)
CPCs:
CPC B64C17/00 (47) · CPC B64C2700/6295 (43) · CPC B64C35/00 (39) · CPC B64C39/00 (32) · CPC B64C3/385 (21) · CPC B64B1/00 (20) · CPC B64C2700/6218 (20) · None (17) · CPC B64C13/00 (14) · CPC B64F2700/6261 (14) · CPC B64C23/005 (12) · CPC B64C3/00 (11) · CPC B64C33/00 (10) · CPC B64C3/56 (8) · CPC B64C2700/6219 (8) · CPC B64C33/02 (6)
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