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Patent Archive
#452450
Patent Information
Calendar Perpetual
Eustache Auguste Cresson
May 19, 1891
Patent #452450
Patent Number: | 452450 |
Description: | Calendar Perpetual |
Inventor(s): | Eustache Auguste Cresson |
Patent Date: | May 19, 1891 |
Registration Type: | Patent |
External Research: | https://www.google.c… |
Patent Document: |