Pocket Watch Database
Patent Archive
#975697
Patent Information
Timepiece Hair Spring Collet
Richard Lange
November 15, 1910
Patent #975697
| Patent Number: | 975697 |
| Description: | Timepiece Hair Spring Collet |
| Inventor(s): | Richard Lange |
| Patent Date: | Nov 15, 1910 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
