Brevetti   Gran Bretagna  

Patent:GB534855

Brevetto:	GB 534855
Titolo:	Improvements in or relating to Slide Rules
Data:	20.03.1941
Luogo:
Nazione:	Gran Bretagna
Persona:	Ben Secker
Ditta:	Standard Telephones
Link interni:
Keywords:
Link al brevetto: (without guarantee)	GB534855

Aus der Patentschrift GB534855

• DATUM: 20.03.1941
• TITEL: Improvements in or relating to slide rules
• PERSON: STANDARD TELEPHONES CABLES LTD