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US Patent: 421,556
Automatic regulator for grain-scales
Patentee:
Charles H. Cooley (exact or similar names) - Hartford, CT

USPTO Classifications:
222/56, 241/34

Tool Categories:

Assignees:
Pratt & Whitney Co. - Hartford, CT

Manufacturer:
Not known to have been produced

Witnesses:
Francis H. Richards
Samuel W. Powell

Patent Dates:
Applied: Feb. 03, 1888
Granted: Feb. 18, 1890

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Pratt & Whitney Co.
Description:
A companion patent to 403,988.

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