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US Patent: 134,548
Check-Valves
Patentee:
John C. Hoadley - Lawrence, Essex County, MA

USPTO Classifications:
137/495, 137/565.15, 137/614.2, 285/180

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

Assignees:
None

Manufacturer:
J. C. Hoadley Co. - Lawrence, Essex County, MA

Witnesses:
George R. Carter
George A. Barnard
M. W. Frothingham
L. H. Latimer

Patent Dates:
Granted: Jan. 07, 1873

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for J. C. Hoadley Co.

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