US Patent: 1,005,883
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| Instument for Making Micrometric Measurements
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Patentees:
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| Pierre Roch (exact or similar names) - Rolle, Switzerland |
| Etienne Challet (exact or similar names) - Rolle, Switzerland |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 28, 1910 |
| Granted: |
Oct. 17, 1911 |
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Joel Havens
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Description: |
| William H. Camfield - patent attorney
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