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US Patent: 160,471
Improvement in Stair-Builders' Rules
Patentee:
John J. Robinson - Orange Court House, VA

USPTO Classifications:
33/332, 33/342, 33/666

Tool Categories:
rules : measuring rods
trade specific : carpenter

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A Thomson
Richard Chapman

Patent Dates:
Applied: Dec. 17, 1874
Granted: Mar. 02, 1875

Patent Pictures:
USPTO pdf tiff
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