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Haliczer |
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1934-05-09 |
1936-09-08 |
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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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1941-05-24 |
1945-05-29 |
Fink Rudolph |
Respirator mask
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1941-12-13 |
1945-08-14 |
Mine Safety Appliances Co |
Facepiece
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1942-06-29 |
1945-06-26 |
American Optical Corp |
Respirator
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1947-12-04 |
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Respirator
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1951-09-15 |
1955-04-26 |
Willson Products Inc |
Flexible construction in respirator mask facepiece
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1952-12-15 |
1958-04-15 |
Dragerwerk Fa |
Respirator
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1954-03-29 |
1958-02-18 |
Pulmosan Safety Equipment Corp |
Respirator
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1954-05-18 |
1958-11-04 |
Electric Storage Battery Co |
Respirator
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1955-01-14 |
1959-02-24 |
Electric Storage Battery Co |
Respirator
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1956-01-05 |
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Electric Storage Battery Co |
Respirator
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Electric Storage Battery Co |
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1958-03-03 |
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Respirator
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1958-03-31 |
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Cover for respirator
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1958-04-23 |
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Electric Storage Battery Co |
Respirator
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1958-10-20 |
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1959-02-02 |
1962-06-05 |
Scott Aviation Corp |
Quick-donning breathing mask
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1961-03-28 |
1965-11-30 |
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1979-09-10 |
1981-02-03 |
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Disposable dust respirator
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1980-09-24 |
1983-02-15 |
Moldex/Metric Products, Inc. |
Disposable face mask
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1985-04-09 |
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Siebe North, Inc. |
Valve assembly for a respirator
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American Cyanamid Company |
Respirator facepiece
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Drägerwerk AG |
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Respiratory mask
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