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US Patent: 61,539
Improvement in Carpenters' Squares
Patentee:
Oren T. Hayes (exact or similar names) - Hastings, MN

USPTO Classifications:
33/419

Tool Categories:
layout tools : squares

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
August Tanner
Edward H. Knight
James L. Ewin
Patent Dates:
Granted: Jan. 29, 1867

Patent Pictures:
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Report data errors or omissions to steward Ralph Brendler
Description:
This patent is for a small metal square with slots to allow adding a second pivoting arm such as those sometimes used on larger framing squares.

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