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Patent:GB1312331


Patent:GB 1312331
Title:IMPROVEMENTS IN AND RELATING TO CALCULATING MACHINES
Date:04.04.1973
Place:San Gabriel, Cal. USA
Country:Great Britain
Person:Mark, Richard S. (P) u.a.
Company:Addmaster (P) Corporation
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Keywords:fraction; Bruch
Link to the patent office:
(without guarantee)
 GB1312331


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