Patents   Great Britain  

Patent:GB706807

Patent:	GB 706807
Title:	Improvements in devices for illustrating and teaching the elementary technic of calculating
Date:	07.04.1954
Place:
Country:	Great Britain
Person:	Svensson, Sven Hjalmar (P)
Company:	Skolmaterieldistrib A B
Internal Links:	Lehrmittel
Keywords:
Link to the patent office: (without guarantee)	GB706807

Aus der Patentschrift GB706807

• DATUM: 07.04.1954
• TITEL: Improvements in devices for illustrating and teaching the elementary technic of calculating
• PERSON: SKOLMATERIELDISTRIB A B