Drilldown: Patents

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Patents > Applicant firm: None & Publication date: 1900 - 1999

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Inventor country:
FR (1919) · DE (628) · US (320) · GB (249) · None (200) · HU (158) · AT (152) · IT (83) · CH (80) · BE (79) · RU (63) · AU (39) · RO (30) · NL (27) · ES (26) · DZ (23) · AH (23) · CA (21) · DK (15) · Poland (13)
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National tech categories:
FR 6.4 (2175) · None (532) · HU V/h (320) · AT 77d (170) · FR 6.3 (115) · FR 6.2 (75) · DE 77h.5 (64) · DE 77h (44) · CH 129b (40) · FR 5.8 (36) · DE 77h.6 (33) · DK 77 (31) · AU 90.3 (27) · FR 10.1 (26) · NL 62 (22) · FR 5.3 (22) · DE 77h.9 (18) · DE 77h.15 (17) · DE 77h.10 (16) · DE 77h.4 (16)
First filing:
Cites these patents:
None (4075) · 1 (7) · 0 (5) · USPC 244/48 (3) · Patent FR-1911-438363 (3) · Patent GB-1909-25116 (2) · USPC 244/26 (2) · 1911 (2) · CPC B64B1/00 (2) · USPC 244/87 (2)
Citations from after 1930:
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