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ELECTRONIC SECRETARY IND Inc

ELECTRONIC
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US3072746A Automatic telephone dialing apparatus Expired / Lapsed 1957-05-01 1963-01-08 2 Details
US3067289A Integrating control timer Expired / Lapsed 1956-07-25 1962-12-04 0 Details
US3050585A Recording and reproducing mechanism of a telephone answerin… Expired / Lapsed 1958-05-12 1962-08-21 0 Details