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US Patent: 157,779
Standard Gauges
Patentee:
Quimby S. Backus (exact or similar names) - Winchendon, MA

USPTO Classifications:
33/544.4

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. L. Wattenburg
G. M. Plympton

Patent Dates:
Applied: Jun. 16, 1874
Granted: Dec. 15, 1874

Patent Pictures:
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