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US Patent: 1,277,481
Tool Holder
Patentee:
William S. Robinson - Chicago, IL

USPTO Classifications:
407/10

Tool Categories:

Assignees:
Armstrong Bros. Tool Co. - Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
W. L. Kilroy
Harry R. L. White

Patent Dates:
Applied: Aug. 11, 1917
Granted: Sep. 03, 1918

Patent Pictures:
USPTO pdf tiff
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Armstrong Brothers Tool Co. history
"Vintage Machinery" entry for Armstrong Brothers Tool Co.
Description:
Miller, Chindahl & Parker - patent attorneys

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