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Patent:US1160798


Patent:US 1160798
Title:Computing Instrument
Date:16.11.1915
Place:
Country:USA
Person:Y. Wang
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1160798 (espacenet),  US1160798 (uspto)


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Aus der Patentschrift US1160798

Beschrieben in: Bruce O. B. Williams "The Computing Board: An Ambituous All-Purpose Calculating Device and Some Similar Concepts" in Journal of the Oughtred Society Vol 12, No. 1, Spring 2003