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US Patent: 1,162,197
Chuck
Patentee:
Verner J. Wahlstrom (exact or similar names) - Brooklyn, NY

USPTO Classifications:
279/72, 81/53.2

Tool Categories:

Assignees:
Wahlstrom Tool Co. - New York, NY

Manufacturer:
Wahlstrom Tool Co. - Brooklyn, NY

Witnesses:
Elizabeth Louise Russell
Sydney I. Prescott

Patent Dates:
Applied: Dec. 22, 1914
Granted: Nov. 30, 1915

Patent Pictures:
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Vintage Machinery entry for Wahlstrom Tool Co.
Description:
Wahlstrom drill chucks have been in continuous production for more than a century, and the name is sometimes used as a synonym for a keyless chuck. An example has been seen marked, "Wahlstrom Tool Co. / Brooklyn, N.Y. / Pat. May 14.1912 / Nov 30.1915". The first patent date corresponds to patent 1,026,187.

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