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Sigma Instruments Inc

Sigma Inst

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US4271384A	Synchronous motor drive	Expired / Lapsed	1977-11-10	1981-06-02	23	Details
US3777196A	Low-inertia synchronous inductor motor	Expired / Lapsed	1972-10-20	1973-12-04	8	Details
US3363174A	Insulating support for high voltage line conductor, includi…	Expired / Lapsed	1963-07-18	1968-01-09	2	Details
US3350581A	Condition-initiated circuit-controlling apparatus	Expired / Lapsed	1963-07-11	1967-10-31	2	Details
US2834896A	Stepping motor	Expired / Lapsed	1955-09-28	1958-05-13	0	Details