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Hartford Special Machinery Co

Hartford S
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US3020460A Position control servosystem Expired / Lapsed 1958-07-21 1962-02-06 0 Details
US2712987A Abrading belt and method of making it Expired / Lapsed 1951-10-09 1955-07-12 2 Details