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DONALD R MIDDLETON

DONALD R M
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2630557A Regulated rectifying apparatus Expired / Lapsed 1951-07-11 1953-03-03 0 Details
US2435572A Voltage regulation Expired / Lapsed 1945-01-31 1948-02-10 0 Details