Pocket Watch Database
Patent Archive
#497331
Patent Information
Time Stamp Automatic
Warren B. Martindale
May 16, 1893
Patent #497331
| Patent Number: | 497331 |
| Description: | Time Stamp Automatic |
| Inventor(s): | Warren B. Martindale |
| Patent Date: | May 16, 1893 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
