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Patent:US2699892


Patent:US 2699892
Title:Add-subtract calculating machine
Date:18.01.1955
Place:
Country:USA
Person:William Excell Arthur
Company:Powers Samas Account Mach Ltd
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2699892 (espacenet),  US2699892 (uspto)


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Aus der Patentschrift US2699892