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US Patent: 1,529,210
Hook Rule
Patentee:
John W. Parker - Barrington, RI

USPTO Classifications:
33/490, 33/832

Tool Categories:
rules : rule accessories

Assignees:
Brown & Sharpe Mfg. Co. - Providence, RI

Manufacturer:
Not known to have been produced

Witnesses:
S. N. Barry
J. A. Miller

Patent Dates:
Applied: Dec. 15, 1923
Granted: Mar. 10, 1925

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Brown & Sharpe Mfg. Co.
Description:
Hook used for taking measurements through a hole and designed to enable calipering.

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