US Patent: 2,957,247
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| Groove Location and Width Gauge
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Patentees:
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| Melvin C. Brown (exact or similar names) - Kalamazoo, MI |
| Paul F. Grabbe, Jr. (exact or similar names) - Antwerp Township, Van Buren County, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 15, 1958 |
| Granted: |
Oct. 25, 1960 |
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Joel Havens
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Description: |
| Woodhams, Blanchard & Flynn - patent attorneys
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