Pocket Watch Database
Patent Archive
#1891281
Patent Information
Clock Alarm Single Spring
William D. Johnson
December 20, 1932
Patent #1891281
| Patent Number: | 1891281 |
| Description: | Clock Alarm Single Spring |
| Inventor(s): | William D. Johnson |
| Patent Date: | Dec 20, 1932 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
