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HOWTON RADIO ALARM Co

HOWTON RAD
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2250828A Alarm system control Expired / Lapsed 1938-02-21 1941-07-29 0 Details
US2250834A Radio alarm system Expired / Lapsed 1938-01-12 1941-07-29 0 Details
US2249560A Radio alarm system Expired / Lapsed 1938-02-21 1941-07-15 0 Details