Pocket Watch Database
Patent Archive
#428318
Patent Information
Clock Calendar Perpetual
Henry S. Prentiss
May 20, 1890
Patent #428318
| Patent Number: | 428318 |
| Description: | Clock Calendar Perpetual |
| Inventor(s): | Henry S. Prentiss |
| Patent Date: | May 20, 1890 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
