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US Patent: 721,379
Calipers or Dividers
Patentee:
Nathan E. Martin (exact or similar names) - Greenfield, MA

USPTO Classifications:
33/558.1

Tool Categories:
layout tools : calipers
layout tools : compasses : dividers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. Midday
Edward L. Reed
Burt H. Winn
Lyman W. Griswold

Patent Dates:
Applied: Apr. 26, 1902
Granted: Feb. 24, 1903

Patent Pictures:
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