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MSA Safety Inc

MSA Safety

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
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
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