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US Patent: 1,447,447
Valve Lifting Device
Patentee:
Joseph E. Wainwright (exact or similar names) - Brooklyn, NY

USPTO Classifications:
29/221

Tool Categories:
specialty tools : valve spring tools

Assignees:
None

Manufacturer:
W-W Co. - Brooklyn, NY

Witnesses:
Guy M. Spring
I. L. McCathran
H. F. Klopper

Patent Dates:
Applied: Jan. 07, 1922
Granted: Mar. 06, 1923

Patent Pictures:
Joseph E. Wainwright patent March 23, 1923
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Description:
Improvement on the "lazy tongs" type valve lifter in patent no. 1,392,373. The second of two patents referenced by date on the W-W Co. valve lifter.

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