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US Patent: 35,812
Improvement in Parallel Rulers
Patentees:
Ira Myrick (exact or similar names) - Le Sueur, MN
James C. Dow (exact or similar names) - Henderson, MN

USPTO Classifications:
33/449

Tool Categories:
rules

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. L. Hayes
A. Moore
Ed. L. Becker
N. Myrick

Patent Dates:
Granted: Jul. 08, 1862

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Ralph Brendler
Description:
This draftsman's ruler uses a set of sring-loaded rollers to allow it to easily slide on the page, yet still allowing a slight push to hold it in place.

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