Pocket Watch Database
Patent Archive
#693647
Patent Information
Clock Program & Call
William A. Hirschfield
February 18, 1902
Patent #693647
| Patent Number: | 693647 |
| Description: | Clock Program & Call |
| Inventor(s): | William A. Hirschfield |
| Patent Date: | Feb 18, 1902 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
