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US Patent: AI89
Lever scale for canals and railways
Patentees:
Samuel A. Abbott (exact or similar names) - Unknown, Unknown
Ely Ellicott (exact or similar names) - Unknown, Unknown

USPTO Classifications:
177/259

Tool Categories:
layout tools : levels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Granted: Aug. 14, 1849

Reissue Information:
Reissue of 6,097 (Feb. 06, 1849)

Patent Pictures:
USPTO (New site tip)
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