Pocket Watch Database
Patent Archive
#697427
Patent Information
Recorder Calculagraph
Henry Abbott
April 15, 1902
Patent #697427
| Patent Number: | 697427 |
| Description: | Recorder Calculagraph |
| Inventor(s): | Henry Abbott |
| Assignee: | Calculagraph Co |
| Patent Date: | Apr 15, 1902 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
