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Patent:US2724551


Patent:US 2724551
Title:Constant device for calculating machine
Date:22.11.1955
Place:Trumbull und New York
Country:USA
Person:Anderson, Walter (P)
Company:Underwood (P) Corp.
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2724551 (espacenet),  US2724551 (uspto)


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