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US Patent: 1,404,450
Direct Reading Proportional Scale
Patentee:
Georges A. Lofland - New York, NY

USPTO Classifications:
235/61B

Tool Categories:
rules : slide rules : scales

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Dec. 09, 1919
Granted: Jan. 24, 1922

Patent Pictures:
USPTO pdf tiff
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Description:
H. H. Dyke - patent attorney

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