Pocket Watch Database
Patent Archive
#637387
Patent Information
Clock Program Alarm
John L. Hall
November 21, 1899
Patent #637387
| Patent Number: | 637387 |
| Description: | Clock Program Alarm |
| Inventor(s): | John L. Hall |
| Patent Date: | Nov 21, 1899 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
