Pocket Watch Database
Patent Archive
#499737
Patent Information
Clock Secondary Electric
Richard S. Howland
June 20, 1893
Patent #499737
Patent Number: | 499737 |
Description: | Clock Secondary Electric |
Inventor(s): | Richard S. Howland |
Patent Date: | Jun 20, 1893 |
Registration Type: | Patent |
External Research: | https://www.google.c… |
Patent Document: |