US Patent: 2,507,677
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Polishing machine
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Patentees:
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Clifford I. Packer (exact or similar names) - Meriden, CT |
Paul R. Nickerson (exact or similar names) - Yalesville, CT |
John F. Harper (exact or similar names) - Portland, CT |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Jul. 16, 1947 |
Granted: |
May 16, 1950 |
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Jeff Joslin
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