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H A DOUGLAS Manufacturing Co

H A DOUGLA
Active Patents
0
Total Holdings
5

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2361448A Electrical connection means Expired / Lapsed 1942-08-24 1944-10-31 0 Details
US2346831A Electrical connection means Expired / Lapsed 1943-06-15 1944-04-18 0 Details
US2318651A Electrical connection means Expired / Lapsed 1941-10-11 1943-05-11 0 Details
US2318650A Electrical connection means Expired / Lapsed 1940-04-01 1943-05-11 0 Details
US2299787A Electrical connection means Expired / Lapsed 1939-03-17 1942-10-27 0 Details