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US Patent: 527,600
Door-Lock-Marking Gage
Patentee:
Frank K. Etherington - Cambridge, MA

USPTO Classifications:
144/27, 33/197

Tool Categories:
layout tools : marking gauges : butt gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Geo. H. Morse
Fred A. Morser
H. Brown
A. C. Harmon

Patent Dates:
Applied: Nov. 20, 1893
Granted: Oct. 16, 1894

Patent Pictures:
USPTO pdf tiff
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Description:
A butt gage that marks not only the position of the mortise for a door lock, but also the location of the knob hole.

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