Pocket Watch Database
Patent Archive
#2363128
Patent Information
Grind Machine
Robert Daniel Heffelfinger
November 21, 1944
Patent #2363128
| Manufacturer: | Hamilton |
| Patent Number: | 2363128 |
| Description: | Grind Machine |
| Inventor(s): | Robert Daniel Heffelfinger |
| Assignee: | Hamilton Watch Co |
| Patent Date: | Nov 21, 1944 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
