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Patents > Filing date: 1911 & National tech categories : HU V/h or USPC 244/80

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John P. Tarbox (4) · None (3) · Karl Bomhard (3) · Dőry Béla Jobaházi (2)
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None (7) · Karl Bomhard (3) · Dőry Béla Jobaházi (2)
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