US Patent: 44,874 - Metal Ruler


	Home\| FAQ	Search:Advanced\|Person\|Company\| Type\|Class	Login


Quick search:	Patent number:	Patent Date:

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:

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.