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US Patent: 195,693
Attachment to Parallel Rulers
Patentee:
Henry K. Averill, Jr. (exact or similar names) - Plattsburg, Clinton County, NY

USPTO Classifications:
33/454

Tool Categories:
rules : parallel rules
rules : rule accessories

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Aug. 14, 1877
Granted: Oct. 02, 1877

Patent Pictures:
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