Drilldown: Patents

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Patents > Year filed: 1912 & Tech fields : instrument or None

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None (224) · Victor J. Evans (5) · None (3) · Brandon frères (3) · Boult, Wade & Tennant (2) · Coventry & Williams (2) · Gaston Rose (2) · P. R. J. Willis (2) · Marks & Clerk (2) · Munn & Co. (2) · Armengaud jeune (2) · J. S. Withers & Spooner (2) · Haseltine, Lake & Co. (2) · Abel & Imray (2) · Dom. Casalonga (2) · Dupont et Elluin (2) · A. A. Thornton (2)
National tech categories:
None (193) · FR 6.4 (32) · USPC 244/48 (6) · USPC 244/80 (5) · USPC 244/233 (4) · USPC 244/90R (4) · USPC 244/100R (3) · USPC 244/45R (3) · USPC 244/139 (3) · USPC 244/87 (3) · USPC 244/104R (3) · USPC 244/119 (3) · FR 5.3 (3) · USPC 244/35R (2) · USPC 244/110H (2) · USPC 244/73R (2) · USPC 244/121 (2) · USPC 244/38 (2) · USPC 244/91 (2) · USPC 244/92 (2)
CPCs:
CPC B64C2700/6295 (35) · CPC B64C17/00 (22) · CPC B64C39/00 (18) · CPC B64C13/00 (15) · CPC B64C3/00 (14) · None (14) · CPC B64C35/00 (14) · CPC B64C33/02 (13) · CPC B64C23/005 (13) · CPC B64C3/385 (12) · CPC B64C3/14 (8) · CPC B64B1/00 (6) · CPC B64C2700/6235 (6) · CPC B64C2700/6218 (6)
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