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US Patent: 1,934,232
Slide rule
Patentee: Adolf W. Keuffel (exact or similar names) - Montclair, NJ USPTO Classifications: 235/70R, 411/103, 411/180, 411/54, 411/80.6 Tool Categories: rules : slide rules specialty tools : slide rules Assignees: Keuffel & Esser Co. - Hoboken, NJ Manufacturer: Keuffel & Esser Co. - Hoboken, NJ Witnesses: Unknown	Patent Dates: Applied: Feb. 11, 1932 Granted: Nov. 07, 1933 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: This patent number was seen on a slide rules from Keuffel & Esser.

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