Patent:GB407274

From the great encyclopedia of mechanical calculating


Patent:GB 407274
Title:Improved device for demonstrating the fundamental arithmetical operations
Date:15.03.1934
Place:
Country:Great Britain
Person:Giulio Sbocchelli
Company:
Internal Links:
Keywords:Abakus
Link to the patent office:
(without guarantee)
 GB407274 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=GB407274)


Enlarge

Aus der Patentschrift GB407274

Retrieved from "http://www.rechnerlexikon.de/en/wiki.phtml?title=Patent:GB407274"
This page was last modified 20:30, 31. Oct 2007.