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MARTHA H WRIGHT

MARTHA H W
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2288124A Drilling string protector Expired / Lapsed 1939-11-13 1942-06-30 0 Details
US2197991A Tool for straightening well bores Expired / Lapsed 1936-10-10 1940-04-23 0 Details