Pocket Watch Database
Patent Archive
#2571878
Patent Information
Spring Wind Device
Charles K. Johns
Charles Hill
October 16, 1951
Patent #2571878
| Patent Number: | 2571878 |
| Description: | Spring Wind Device |
| Inventor(s): |
Charles K. Johns Charles Hill |
| Assignee: | Hil-jon Safety Crown Corp |
| Patent Date: | Oct 16, 1951 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
