US Patent: 1,261,933
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| Grease Gun
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Patentees:
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| Harry H. Hipwell (exact or similar names) - Pittsburgh, PA |
| Harry T. Hipwell (exact or similar names) - Pittsburgh, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 24, 1917 |
| Granted: |
Apr. 09, 1918 |
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Joel Havens
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Description: |
| C. A. Knowles - patent attorney
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