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AMERICAN TELEGRAPHONE Co

AMERICAN T
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US1142384A Telegraphone. Expired / Lapsed 1909-03-17 1915-06-08 0 Details
US909414A Telegraphone apparatus. Expired / Lapsed 1907-12-31 1909-01-12 0 Details