Pocket Watch Database
Patent Archive
#406989
Patent Information
Time Signal
Nicholas H. Borgfeldt
July 16, 1889
Patent #406989
| Patent Number: | 406989 |
| Description: | Time Signal |
| Inventor(s): | Nicholas H. Borgfeldt |
| Patent Date: | Jul 16, 1889 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
