US Patent: 79,603 - Improvement in Calipers


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US Patent: 79,603

Improvement in Calipers

Patentee:

Sylvanus Sawyer (exact or similar names) - Fitchburg, MA

USPTO Classifications:

33/558.06

Tool Categories:

layout tools : calipers

Assignees:

None

Manufacturer:

Unknown

Witnesses:

N. C. Lombard

David Pray

Patent Dates:
Granted:	Jul. 07, 1868

Patent Pictures: [ 1 | 2 ]

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Description:

This improvement to the earlier patent #63,656 (4/9/1867) features an improved (and even more complicated) adjustment mechanism mounted in the center post.