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US Patent: 1,391,621
Extension Rule
Patentee:
Frederick Henry Fenwirth (exact or similar names) - New York, NY

USPTO Classifications:
235/70R, 33/809

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jan. 26, 1920
Granted: Sep. 20, 1921

Patent Pictures: [ 1 | 2 ]
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Description:
Carpenter's rule with sliding sections rather than typical folding sections.

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