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CA Patent: CA-90,643
Level and grade finders
Patentee:
Edward Helb (exact or similar names) - Railroad, PA

USPTO Classifications:

Tool Categories:
layout tools : levels : inclinometers

Assignees:
None

Manufacturer:
Edward Helb - Railroad, PA

Witnesses:
Unknown
Patent Dates:
Applied: Oct. 13, 1904
Granted: Dec. 20, 1904

Patent Pictures:
CIPO Data
Report data errors or omissions to steward Jeff Joslin
Description:
This is the Canadian equivalent of US patent 764,809.

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