Pocket Watch Database
Patent Archive
#3121307
Patent Information
Timepiece Balance Spring Collet Fastening Spring
Rudolf Greiner
February 18, 1964
Patent #3121307
| Patent Number: | 3121307 |
| Description: | Timepiece Balance Spring Collet Fastening Spring |
| Inventor(s): | Rudolf Greiner |
| Assignee: | Greiner Electronic A G |
| Patent Date: | Feb 18, 1964 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
