Brevetti   Gran Bretagna  

Patent:GB153344

Brevetto:	GB 153344
Titolo:	Improvements in and relating to apparatus for selecting or checking statistical cards
Data:	02.11.1920
Luogo:
Nazione:	Gran Bretagna
Persona:	Rogers, F. H.
Ditta:	Liberty Systems Corp
Link interni:
Keywords:
Link al brevetto: (without guarantee)	GB153344

Aus der Patentschrift GB153344

• DATUM: 02.11.1920
• TITEL: Improvements in and relating to apparatus for selecting or checking statistical cards
• PERSON: LIBERTY SYSTEMS CORP