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1861-01-29 |
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1919-11-25 |
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1933-11-01 |
1935-02-05 |
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1934-02-05 |
1935-08-27 |
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1945-04-18 |
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1948-09-22 |
1951-08-21 |
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1951-09-13 |
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1953-04-13 |
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1955-09-06 |
1958-02-18 |
Paperlynen Company |
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1956-05-01 |
1961-09-05 |
Chemetron Corp |
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1961-05-05 |
1963-03-26 |
Welsh Mfg Co |
Head straps for respirator
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CH418144A
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1964-11-06 |
1966-07-31 |
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1967-07-21 |
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Automatic Sprinkler Corp |
Head harness
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1967-09-27 |
1970-05-26 |
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Mechanism for altitude controlled mask harness tension compensating device and front harness adjustment
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1969-03-12 |
1971-08-17 |
Sierra Eng Co |
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1969-09-09 |
1974-04-09 |
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1969-12-12 |
1971-08-17 |
Intertechnique Sa |
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1970-10-23 |
1980-04-01 |
Halbrand, Inc. |
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1971-11-08 |
1973-08-14 |
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1972-04-10 |
1974-02-19 |
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1972-05-04 |
1973-12-14 |
Dupre Jacques Philippe |
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1974-01-21 |
1976-07-27 |
Minnesota Mining And Manufacturing Company |
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1974-03-26 |
1978-07-11 |
Kimberly-Clark Corporation |
Nonwoven fabric and method of producing same
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1975-03-21 |
1976-10-15 |
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1976-03-15 |
1977-06-07 |
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Face mask
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1976-08-02 |
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1976-12-23 |
1987-10-01 |
Minnesota Mining & Mfg |
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1978-02-06 |
1980-08-05 |
Minnesota Mining And Manufacturing Company |
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1981-02-03 |
American Cyanamid Company |
Disposable dust respirator
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International Mask Research Foundation |
Method of making masks
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1981-03-10 |
1983-11-15 |
U.S.D. Corp. |
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1981-03-12 |
1983-03-08 |
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1981-11-19 |
1984-03-20 |
Figgie International Inc. |
Pneumatic head harness
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1982-03-04 |
1984-01-31 |
Minnesota Mining And Manufacturing Company |
Sheet product containing sorbent particulate material
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1982-08-27 |
1985-06-25 |
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1987-09-24 |
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1984-12-18 |
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1983-11-07 |
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Disposable surgical mask having a self-contained supply of anti-bacterial material
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Air purifying respirator suspension
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