Brevetti   Stati Uniti  

Patent:US2892266

Brevetto:	US 2892266
Titolo:	Calculator keyboard simulator for training purposes
Data:	30.06.1959
Luogo:
Nazione:	Stati Uniti
Persona:	Tomkins John A
Ditta:
Link interni:
Keywords:
Link al brevetto: (without guarantee)	US2892266 (espacenet),  US2892266 (uspto)

Aus der Patentschrift US2892266

• DATUM: 30.06.1959
• TITEL: Calculator keyboard simulator for training purposes