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Patent Archive
#2146340
Patent Information
Automatic Calendar
Zdnek Jiskra
February 7, 1939
Patent #2146340
| Patent Number: | 2146340 |
| Description: | Automatic Calendar |
| Inventor(s): | Zdnek Jiskra |
| Patent Date: | Feb 7, 1939 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
