US Patent: 921,068
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| Punching or Shearing Machine
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Patentees:
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| Charles A. Bertsch (exact or similar names) - Cambridge City, Wayne County, IN |
| Hermann Schelhammer (exact or similar names) - Cambridge City, Wayne County, IN |
| Lawrence H. Bertsch (exact or similar names) - Cambridge City, Wayne County, IN |
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Patent Dates:
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| Applied: |
Jul. 02, 1908 |
| Granted: |
May 11, 1909 |
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Joel Havens "Vintage Machinery" entry for Bertsch & Co.
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