US Patent: 2,791,921
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Lathe System or the Like
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Patentees:
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Charles W. Heppenstall (exact or similar names) - Fox Chapel, PA |
Harry J. Ross (exact or similar names) - Pittsburgh, PA |
Frederick F. Rohrer (exact or similar names) - Pittsburgh, PA |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Sep. 29, 1951 |
Granted: |
May 14, 1957 |
USPTO (New site tip) Google Patents
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Joel Havens
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