Drilldown: Patents

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Patents > Office : US or Other & Grant date: 1900 - 1999

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US (3467) · FR (3339) · GB (1338) · DE (1337) · None (479) · AT (318) · IT (212) · HU (187) · CH (142) · BE (137) · CA (110) · RU (106) · AU (70) · NL (44) · RO (42) · SE (40) · ES (37) · MX (36) · AH (34) · DZ (27)
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