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National Cylinder Gas Co

National C
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2766765A Method and apparatus for maintaining uniform flow resistance Expired / Lapsed 1952-04-30 1956-10-16 0 Details
US2670224A Sphero-conically generated fitting Expired / Lapsed 1947-02-08 1954-02-23 0 Details
US2493388A Magnetic control system Expired / Lapsed 1946-08-17 1950-01-03 0 Details