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US Patent: 420,887
Escape-valve for dash-pots
Patentee:
Franklin Phillips - Newark, NJ

USPTO Classifications:
137/533, 188/282.1

Tool Categories:

Assignees:
Hewes & Phillips Iron Works - Newark, NJ

Manufacturer:
Not known to have been produced

Witnesses:
Thomas S. Crane
James A. Thomson

Patent Dates:
Applied: Nov. 24, 1888
Granted: Feb. 04, 1890

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Hewes & Phillips

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