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JAMES KNIGHTS Co

JAMES KNIG
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2877338A Method of adjusting the operating frequency of sealed piezo… Expired / Lapsed 1954-10-22 1959-03-10 0 Details
US2505121A Method of finishing crystals Expired / Lapsed 1949-03-04 1950-04-25 0 Details