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US Patent: 2,698,484
Rule Trammel
Patentees:
Fred Schwarzer - Pottstown, PA
Charles R. Zern - Pottstown, PA

USPTO Classifications:
33/27.01, 33/458

Tool Categories:
rules : rule accessories
layout tools : compasses : trammels

Assignees:
Fred Schwarzer - Pottstown, PA
Charles R. Zern - Pottstown, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 18, 1954
Granted: Jan. 04, 1955

Patent Pictures:
USPTO pdf tiff
Google Patents
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Description:
This is an attachment for a zig-zag rule to allow it to be used as a trammel.

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