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US Patent: 1,338,670
Means for Measuring the Pitch of Screws and the Like
Patentees:
Wilford Bolton (exact or similar names) - Accrington, Lancashire County, England
Ernest T. Bishop (exact or similar names) - Reading, Berkshire County, England

USPTO Classifications:
33/199B, 33/83

Tool Categories:
metalworking tools : machinist tools : measuring tools : thread gages

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 24, 1918
Granted: May 04, 1920

Patent Pictures:
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