US Patent: 680,525
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Drop Hammer
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Patentees:
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Paul Hanzer (exact or similar names) - Petit Ivry, Seine, France |
Jean Chevalier (exact or similar names) - Petit Ivry, Seine, France |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Apr. 23, 1900 |
Granted: |
Aug. 13, 1901 |
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Joel Havens
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