US Patent: 14,991
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| Operating slide-valves for steam-engines
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Patentee:
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| John F. Allen (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
May 27, 1856 |
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Jeff Joslin
Vintage Machinery entry for Porter-Allen Engine Co.
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Description: |
| The inventor would become partner in the important innovator in high-speed steam engines, the Porter-Allen Engine Co. This patent precedes that venture. |
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