US Patent: 1,900,730
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| Camera Back
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Patentees:
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| William H. Petit (exact or similar names) - Rochester, Monroe County, NY |
| Edson S. Hineline (exact or similar names) - Rochester, Monroe County, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 11, 1931 |
| Granted: |
Mar. 07, 1933 |
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Joel Havens
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