Pocket Watch Database
Patent Archive
#1818958
Patent Information
Timer Security
Arthur B. Chapman
August 11, 1931
Patent #1818958
| Patent Number: | 1818958 |
| Description: | Timer Security |
| Inventor(s): | Arthur B. Chapman |
| Assignee: | Dbl A Alarm Co |
| Patent Date: | Aug 11, 1931 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
