9 Utility and 6 Design Patents
#772 in Pittsburgh, PA
#8,141 in Pennsylvania
#223,555 in US
#455,458 in the World
rank by utility patentsForward Citations = 168
Company Filing History:



4. 2 out of 242
Mine Safety Appliances Company
5. 1 out of 112
where one patent can have more than one assignee
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