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HAMMOND HOLDING Corp

HAMMOND HO
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US1998620A Dynamic control by intertube coupling devices Expired / Lapsed 1933-02-15 1935-04-23 0 Details
US1998617A Automatic volume control Expired / Lapsed 1930-05-12 1935-04-23 0 Details