Pocket Watch Database
Patent Archive
#2209172
Patent Information
Hair Spring For Time Instrument
James R. Putnam
July 23, 1940
Patent #2209172
| Patent Number: | 2209172 |
| Description: | Hair Spring For Time Instrument |
| Inventor(s): | James R. Putnam |
| Assignee: | Waterbury Clock Co |
| Patent Date: | Jul 23, 1940 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
