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Patent:US3099391


Patent:US 3099391
Title:Ten Key Computing Machine
Date:30.07.1963
Place:
Country:USA
Person:Heinze, Werner (P)
Company:Precisa (P)
Internal Links:Rückübertragung, Zehnertastatur
Keywords:
Link to the patent office:
(without guarantee)
 US3099391 (espacenet),  US3099391 (uspto)


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Aus der Patentschrift US3099391

4-function machine with back transfer - very thorough description, kybd p28