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US Patent: 1,665,504
Leveling Square
Patentee:

USPTO Classifications:
33/334, 33/429, 33/451, 7/150

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 21, 1925
Granted: Apr. 10, 1928

Patent Pictures:
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