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ALERTRONIC PROTECTIVE CORP OF

ALERTRONIC
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2623931A Circuit for detection of frequency differences and apparatu… Expired / Lapsed 1948-12-04 1952-12-30 0 Details
US2615970A Dummy intruder for intruder detection systems Expired / Lapsed 1951-09-12 1952-10-28 0 Details