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Patent:US1585470


Patent:US 1585470
Title:Perpetual calendar
Date:18.05.1926
Place:Medfield, MA
Country:USA
Person:Brisset des Nos, Louis
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1585470 (espacenet),  US1585470 (uspto)


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