Pocket Watch Database
Patent Archive
#3477222
Patent Information
Clock Calendar Electric
Lau Chun Leung
Lau Chi Leung
November 11, 1969
Patent #3477222
| Patent Number: | 3477222 |
| Description: | Clock Calendar Electric |
| Inventor(s): |
Lau Chun Leung Lau Chi Leung |
| Patent Date: | Nov 11, 1969 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
