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Patents > Tech fields: control & Supplementary to patent : Patent BE-1909-218585 or None

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None (167) · Weismann et Marx (10) · Haseltine, Lake & Co. (9) · None (9) · Munn & Co. (8) · John P. Tarbox (7) · Armengaud jeune (7) · Boult, Wade & Tennant (5) · Brewer & Son (5) · Lavoix et Mosès (4) · G. F. Redfern & Co. (4) · Marks & Clerk (4) · Brierley & Howard (4) · J. Germain (4) · E. Blétry (3) · Hippolyte Josse (3) · Dupont et Elluin (3) · L. Chassevent (3)
National tech categories:
None (142) · FR 6.4 (77) · BE K (23) · DE 77h.5 (16) · HU V/h (15) · DE 77 (9) · FR 6.3 (8) · USPC 244/233 (7) · USPC 244/90R (6) · USPC 244/80 (6) · AT 77d (5) · USPC 244/79 (5) · USPC 244/234 (5) · USPC 244/45R (4) · USPC 244/237 (4) · DE 77h.15 (3) · DE 77h (3) · USPC 244/51 (3) · USPC 244/225 (3)
IPCs:
None (167) · IPC B64C13/00 (45) · IPC B64C17/00 (22) · IPC B64C39/00 (17) · IPC B64C1/00 (15) · IPC B64C3/38 (11) · IPC B64C13/12 (10) · IPC CPC B64C13/00 (10) · IPC B64C13/04 (8) · IPC B64B1/00 (7) · IPC B64C33/02 (7) · IPC B64C3/54 (7) · IPC B64C13/24 (6) · IPC B64C23/00 (6) · IPC B64C9/00 (5) · IPC B64C3/48 (5) · IPC B64C3/00 (4) · IPC B64C33/00 (4) · IPC B64B1/40 (4) · IPC B64D35/04 (4)
CPCs:
None (101) · CPC B64C13/00 (71) · CPC B64C2700/6256 (29) · CPC B64C17/00 (25) · CPC B64C13/12 (15) · CPC B64C3/385 (13) · CPC B64C2700/6295 (12) · CPC B64B1/00 (11) · CPC B64C39/00 (10) · CPC B64C9/00 (8) · CPC B64C13/24 (8) · CPC B64C33/02 (8) · CPC B64C2700/6212 (7) · CPC B64C13/04 (7) · CPC B64C23/005 (6) · CPC B64C1/00 (6)
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