US Patent: 1,918,743
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| Valve Grinder
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Patentees:
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| Fred H. Etzenhouser (exact or similar names) - Independence, MO |
| Robert C. Murphy (exact or similar names) - Independence, MO |
| Frank P. Tandy (exact or similar names) - Independence, MO |
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Patent Dates:
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| Applied: |
May 09, 1930 |
| Granted: |
Jul. 18, 1933 |
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Patent Pictures:
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Fred H. Etzenhouser et. al. patent July 18, 1933 |
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Stan Schulz
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Description: |
| The patent focuses on the centering device surrounding the vacuum cup. The patent number appears on the K-D No. 503 valve grinder. |
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