Patent:GB1312331

Brevetto:	GB 1312331
Titolo:	IMPROVEMENTS IN AND RELATING TO CALCULATING MACHINES
Data:	04.04.1973
Luogo:	San Gabriel, Cal. USA
Nazione:	Gran Bretagna
Persona:	Mark, Richard S. (P) u.a.
Ditta:	Addmaster (P) Corporation
Link interni:
Keywords:	fraction; Bruch
Link al brevetto: (without guarantee)	GB1312331

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