Pocket Watch Database
Patent Archive
#2722097
Patent Information
Clock Conical Pendulum Alternate Current
Edouard Lefrand
November 1, 1955
Patent #2722097
| Patent Number: | 2722097 |
| Description: | Clock Conical Pendulum Alternate Current |
| Inventor(s): | Edouard Lefrand |
| Assignee: | Conservatoire National Des Art |
| Patent Date: | Nov 1, 1955 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
