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US Patent: 331,360
Piston for Air Pumps
Patentees:
James A. Woodbury - Winchester, Middlesex County, MA
Joshua Merrill - Boston, Suffolk County, MA
George Patten - Boston, Suffolk County, MA
Edward F. Woodbury - Boston, Suffolk County, MA

USPTO Classifications:
92/189, 92/220

Tool Categories:
industrial machines : pneumatic : air pumps

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Apr. 13, 1885
Granted: Dec. 01, 1885

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Woodbury, Merrill, Patten and Woodbury Air Engine Co.

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