Patent Assignment Details
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Reel/Frame: | 005183/0456 | |
| Pages: | 1 |
| | Recorded: | 11/20/1989 | | |
Conveyance: | ASSIGNMENT OF ASSIGNORS INTEREST. |
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Total properties:
1
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Patent #:
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Issue Dt:
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02/05/1991
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Application #:
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07439288
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Filing Dt:
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11/20/1989
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Title:
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NEGATIVE PRESSURE FULL FACE RESPIRATOR HAVING A REPLACABLE VIEWING WINDOW
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Correspondence name and address
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DAVID W. ANDERSON
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3M OFFICE OF PATENT COUNSEL
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P. O. BOX 33427
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ST. PAUL, MN 55133-3427
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