Pocket Watch Database
Patent Archive
#2103656
Patent Information
Chronological Device
John Henry Willis
December 28, 1937
Patent #2103656
| Patent Number: | 2103656 |
| Description: | Chronological Device |
| Inventor(s): | John Henry Willis |
| Patent Date: | Dec 28, 1937 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
