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US Patent: 441,522
Threshold Gage
Patentee:
Alexander Watson (exact or similar names) - Brookline, MA

USPTO Classifications:
33/194

Tool Categories:
layout tools : special purpose gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. W. Baker
B. F. Baker
W. R. Davis
C. Sedgewick

Patent Dates:
Applied: May 31, 1890
Granted: Nov. 25, 1890

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Ralph Brendler
Description:
This tool aids in the layout of door thresholds. It allows adjustment of all aspects of the jamb, allowing the entire door to be layed out in one operation.

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