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US Patent: 53,961
Ruler
Patentee:
R. N. Eagle (exact or similar names) - Washington, DC

USPTO Classifications:
33/483

Tool Categories:
rules

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Alex. A.C. Klauke
Edm. F. Brown
John A. Wiederscheim

Patent Dates:
Granted: Apr. 17, 1866

Patent Pictures:
USPTO (New site tip)
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Description:
This is a simple patent covering insetting a small strip of metal into the edge of a wooden ruler, to provide a sturdier edge. It also has the benefit of being slightly off the paper, so that ink will not bleed under it when used as a straightedge.

It is a simple design, but works well, and is still widely used nearly 150 years later.

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