US Patent: 513,377
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Instrument for Ascertaining Distances
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Patentees:
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Victor De Ziegler (exact or similar names) - Luxemburg, German Empire |
Charles Hager (exact or similar names) - Luxemburg, German Empire |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Jun. 12, 1893 |
Granted: |
Jan. 23, 1894 |
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Joel Havens
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Description: |
Ellis Spear - patent attorney
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