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US Patent: 1,428,422
Calipers
Micrometer-Adjust Calipers
Patentee:
Benjamin Nahabed Dudukian (exact or similar names) - Syracuse, NY

USPTO Classifications:
33/786

Tool Categories:
layout tools : calipers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 09, 1920
Granted: Sep. 05, 1922

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Ralph Brendler
Description:
These calipers use a very accurate micrometer adjustment.

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