US Patent: 9,043X
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Pump
Double forcing pumps
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Patentee:
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| William Douglas (exact or similar names) - Middletown, Middlesex County, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Aug. 20, 1835 |
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Joel Havens
"Vintage Machinery" entry for W. & B. Douglas Mfg. Co.
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Description: |
| Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only. |
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