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Haliczer |
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1934-05-09 |
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Harvey S Cover |
Respirator
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1935-04-04 |
1936-12-29 |
Pulmosan Safety Equipment Corp |
Respirator
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1936-04-06 |
1938-09-20 |
Malcom Robert |
Respirator filter
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Fink Rudolph |
Respirator mask
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1941-12-13 |
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Mine Safety Appliances Co |
Facepiece
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1942-06-29 |
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American Optical Corp |
Respirator
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1947-12-04 |
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1951-09-15 |
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Willson Products Inc |
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1952-12-15 |
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1954-05-18 |
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Electric Storage Battery Co |
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