US Patent: 289,512 - Graduated Measure of Length


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US Patent: 289,512

Graduated Measure of Length

Patentee:

Samuel Darling (exact or similar names) - Providence, RI

USPTO Classifications:

33/494, D10/71

Tool Categories:

rules : rule graduations

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Jacob Kettner

John E. Hall

Patent Dates:
Applied:	Sep. 08, 1883
Granted:	Dec. 04, 1883

Patent Pictures:

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Description:

Scales of ten thousandths of an inch and eleven thousandths of an inch. Darling references his earlier patent 230,619 which uses a line of pricks at an angle with the graduations.