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COLEMAN INSTR Inc

COLEMAN IN
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US3045532A Diffraction grating having a plurality of blaze angles Expired / Lapsed 1958-05-19 1962-07-24 0 Details
US2802174A Null indicator for ph meter Expired / Lapsed 1951-04-20 1957-08-06 0 Details
US2726670A Flow control apparatus Expired / Lapsed 1950-07-28 1955-12-13 0 Details