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MSA Safety Inc

MSA Safety

Active Patents

0

Total Holdings

19

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US4799374A	Liquid separator	Expired / Lapsed	1987-11-13	1989-01-24	6	Details
US3730180A	Pneumatically operated ventilator	Expired / Lapsed	1970-10-21	1973-05-01	12	Details
US3638496A	Pressure transducer	Expired / Lapsed	1970-06-15	1972-02-01	4	Details
US3471698A	Infrared detection of surface contamination	Expired / Lapsed	1967-02-02	1969-10-07	0	Details
US3399398A	Combustible gas monitoring system	Expired / Lapsed	1965-07-27	1968-08-27	2	Details
US3338239A	Surgical puncturing device	Expired / Lapsed	1964-10-08	1967-08-29	2	Details
US3224447A	Electrodes for ventricular defibrillator	Expired / Lapsed	1962-06-25	1965-12-21	2	Details
US3211154A	Sequence switch for ventricular defibrillator	Expired / Lapsed	1962-06-25	1965-10-12	2	Details
US3147465A	Methane alarm and control system	Expired / Lapsed	1960-12-27	1964-09-01	2	Details
US2829908A	Rock dust collecting apparatus	Expired / Lapsed	1956-03-08	1958-04-08	0	Details
US2824558A	Ear plug	Expired / Lapsed	1956-05-24	1958-02-25	0	Details
US2494131A	Oxygen generating canister	Expired / Lapsed	1944-11-27	1950-01-10	2	Details
US2400076A	Air purifying and filtering apparatus	Expired / Lapsed	1939-08-12	1946-05-14	0	Details
US2312227A	Protective hat	Expired / Lapsed	1940-08-03	1943-02-23	0	Details
US2299520A	Method of making extensible conduit	Expired / Lapsed	1940-02-28	1942-10-20	0	Details
US2292003A	Valve	Expired / Lapsed	1939-10-12	1942-08-04	0	Details
US2025772A	Protective headgear	Expired / Lapsed	1934-05-19	1935-12-31	0	Details
US1835883A	Helmet	Expired / Lapsed	1930-03-20	1931-12-08	0	Details
US1328057A	Mouthpiece for breathing apparatus	Expired / Lapsed	1919-05-15	1920-01-13	0	Details