Patents   Great Britain  

Patent:GB407274

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

Aus der Patentschrift GB407274

• DATUM: 15.03.1934
• TITEL: Improved device for demonstrating the fundamental arithmetical operations
• PERSON: GIULIO SBOCCHELLI