Pocket Watch Database
Patent Archive
#3500631
Patent Information
Watch Wrist Crystal
Masayoshi Aoki
March 17, 1970
Patent #3500631
| Patent Number: | 3500631 |
| Description: | Watch Wrist Crystal |
| Inventor(s): | Masayoshi Aoki |
| Assignee: | Kabushiki Kaisha Daini Seikosh |
| Patent Date: | Mar 17, 1970 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
