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USA
Patent:US580464
Patent:
US 580464
Title:
Ready Calculator
Date:
13.04.1897
Place:
Country:
USA
Person:
M. J. Overell
Company:
Internal Links:
Datumsrechner
Keywords:
Link to the patent office:
(without guarantee)
US580464
(espacenet),
US580464
(uspto)
Aus der Patentschrift US580464