Pocket Watch Database
Patent Archive
#773235
Patent Information
Calculator Logarithmic
Elmer A. Sperry
October 25, 1904
Patent #773235
| Patent Number: | 773235 |
| Description: | Calculator Logarithmic |
| Inventor(s): | Elmer A. Sperry |
| Patent Date: | Oct 25, 1904 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
