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Patents > Applicant firm: None & National tech categories : FR 6.4 or USPC 102/400

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FR (1666) · DE (246) · US (172) · GB (124) · IT (61) · BE (59) · AT (53) · RU (41) · CH (37) · HU (22) · RO (20) · DZ (19) · AU (18) · CA (12) · NL (10) · DK (10) · ES (9) · VN (8) · None (7) · EG (7)
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None (470) · Armengaud jeune (263) · None (168) · J. Bonnet-Thirion (80) · E. Blétry (69) · Lavoix et Mosès (59) · L. Chassevent (59) · J. Germain (58) · Weismann et Marx (55) · Charles Dony (51) · Brandon frères (48) · Boramé et Julien (44) · Schwab (43) · Dupont et Elluin (41) · G. de Mestral et F. Harlé (41) · Hippolyte Josse (40) · H. Bœttcher fils (35) · G. Petiau (30) · Dom. Casalonga (30) · Rigot et Prévost (27)
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