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US Patent: 2,698,484
Rule Trammel
Patentees: Fred Schwarzer (exact or similar names) - Pottstown, PA Charles R. Zern (exact or similar names) - 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 (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is an attachment for a zig-zag rule to allow it to be used as a trammel.

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