US Patent: 2,306,970
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| Key Retainer
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Patentees:
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| Floyd MacPherson (exact or similar names) - Stevens Point, WI |
| Carl G. Gunderson (exact or similar names) - Stevens Point, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 15, 1941 |
| Granted: |
Dec. 29, 1942 |
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Joel Havens
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Description: |
| Clarence A. O'Brien - patent attorney
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