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US Patent: 30,138
Cut-off valve for steam-engines
Patentee:
George Frost - Brooklyn, NY

USPTO Classifications:
92/254

Tool Categories:
propulsion and energy : steam engines : steam check valves

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John First
James Frost

Patent Dates:
Granted: Sep. 25, 1860

Patent Pictures:
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Description:
This patent is of some interest because witness John First later became a partner in the important woodworking manufacturer First & Pryibil. An earlier patent, 29,035, was granted to John First and co-assigned to the other witness on this patent, James Frost.

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