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US Patent: 1,339,422
Valve Tool
Patentee:
August C. Rosenbrook (exact or similar names) - Madison, WI

USPTO Classifications:
29/220

Tool Categories:
specialty tools : valve spring tools

Assignees:
None

Manufacturer:
Madison Tool & Stamping Works, Inc. - Madison, WI

Witnesses:
C. L. Waal
H. W. Chase
K. Houghton
Wm. R. Bagley
Patent Dates:
Applied: Feb. 12, 1919
Granted: May 11, 1920

Patent Pictures:
August C. Rosenbrook patent May 11, 1920
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Description:
The specifics of the design are highlighted in the detailed figures.

Madison Tool & Stamping Works' "Liberty" valve spring lifter for FORD was announced in January, 1920.

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