US Patent: 1,707,572
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| Valve Grinder
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Patentee:
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| Leslie G. Roller (exact or similar names) - Cedar Rapids, Linn County, IA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 02, 1927 |
| Granted: |
Apr. 02, 1929 |
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Patent Pictures:
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Leslie G. Roller patent April 2, 1929 |
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Stan Schulz
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Description: |
| Most of the parts are stamped from sheet metal of suitable thickness; the patent claims the primary interrupted gear wheel made from a single stamping. |
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