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Patents > Supplementary to patent : Patent FR-1912-461530 or None & National tech categories: USPC 244/153R

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None (12) · William Franklin Fleharty (2) · Alexander Graham Bell (2) · Claison S. Wardwell (2)
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None (22) · William Franklin Fleharty (2) · Alexander Graham Bell (2) · Claison S. Wardwell (2)
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