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Cleveland Trust Co

Cleveland
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US1802781A Piezo-electric device Expired / Lapsed 1927-05-06 1931-04-28 0 Details
US1802780A Piezo-electric device Expired / Lapsed 1927-05-06 1931-04-28 0 Details
US1641136A Phonometer Expired / Lapsed 1922-03-27 1927-08-30 0 Details