Drilldown: Patents
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Patents > National tech categories:
USPC 244/70
& Number of text pages:
2-3
& Number of diagram pages:
2-6
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Adolph Finch (1) ·
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Amos C. Ellsworth (1) ·
Augustin Henri Hamon (1) ·
Edward Hoult (2) ·
Emma C. Fawkes (1) ·
Fletcher Edward Felts (1) ·
Florentin Barmettler (1) ·
Franklin Tompkins (1) ·
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George F. Swain (1) ·
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