Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 450,640
Slide Rule for Logarithmic Calculations
Patentee:
Rudolph C. Smith - Yonkers, Westchester County, NY

USPTO Classifications:
235/70R

Tool Categories:
specialty tools : slide rules

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Sep. 15, 1888
Granted: Apr. 21, 1891

Patent Pictures:
USPTO pdf tiff
Google Patents
Report data errors or omissions

Copyright © 2002-2017 - DATAMP