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US Patent: 134,548
Check-Valves
Patentee:
John C. Hoadley (exact or similar names) - 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
George G. Mc Lauthlin & Co. - Boston, Suffolk County, MA

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

Patent Dates:
Granted: Jan. 07, 1873

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for J. C. Hoadley Co.
"Vintage Machinery" entry for George G. Mc Lauthlin & Co.

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