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: |
