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US Patent: 1,234,342
Attachment for Calipers
Patentee:
Robert A. Johnson (exact or similar names) - Springfield, Hampden County, MA

USPTO Classifications:
33/828, D10/74

Tool Categories:
metalworking tools : machinist tools : measuring tools : micrometer attachments

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Aug. 16, 1915
Granted: Jul. 24, 1917

Patent Pictures:
USPTO (New site tip)
Google Patents
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