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US Patent: 2,642,848
Air Valve Mechanism for Controling the Operation of Pneumatic Devices and the Like
Patentees:
George M. Walraven - Kenosha, WI
Raymond G. Knudsen - Kenosha, WI

USPTO Classifications:
91/226, 91/229

Tool Categories:

Assignees:
Snap-On Tools Corp. - Kenosha, WI

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Sep. 23, 1947
Granted: Jun. 23, 1953

Patent Pictures:
USPTO pdf tiff
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Snap-On Tools Company History
Description:
Harry C. Alberts - patent attorney

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