United States Bureau of Mines

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Apparatus, breathing
Mine Safety Appliances Company
c. 1927
Apparatus, Breathing
Mine Safety Appliances Company
1951
Apparatus, Breathing
Mine Safety Appliances Company
1926
Badge, Identification
Medallic Art Company
1967
Belt
Mine Safety Appliances Company
Braddock's Demise
Joan Iversen Goswell
1988
Weston Electrical Instrument Corporation
1930-1939
Detector, Gas
Mine Safety Appliances Company
c. 1982
Detector, Gas
Riken Keiki Fine Instrument Company, Limited
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