US Patent: 264,859
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Atmospheric hammer
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Patentee:
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John C. Butterfield (exact or similar names) - Chicago, IL |
USPTO Classifications: |
403/355, 403/55, 403/59, 403/66, 403/81, 72/432, 72/443, 74/568R, 74/581, 74/583, 74/589
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Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Oct. 21, 1879 |
Granted: |
Sep. 26, 1882 |
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Jeff Joslin
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Description: |
Improvements to patent 176,400. |
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