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US Patent: 44,874
Metal Ruler
Patentees:
H. L. Herwig (exact or similar names) - New York, NY
Robert F. McCoy (exact or similar names) - New York, NY

USPTO Classifications:
225/6, 225/91, 33/485

Tool Categories:
rules

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. J. Greenough
C. M. Northup
Frank Horne
Jane Communth

Patent Dates:
Granted: Nov. 01, 1864

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Ralph Brendler
Description:
A simple metal draftsman's ruler, made of bent spring steel. The main innovation here is a "trough" stamped into the edge, such that any ink that should spill from the pen onto the ruler will flow into the trough and not blot the paper.

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