Brevetti   Gran Bretagna  

Patent:GB190804874

Brevetto:	GB 190804874
Titolo:	Improvements in Adding and Subtracting Machines
Data:	03.03.1909
Luogo:
Nazione:	Gran Bretagna
Persona:	Randall, Frederick William (P), Schooling, William (P)
Ditta:
Link interni:
Keywords:
Link al brevetto: (without guarantee)	GB190804874

Aus der Patentschrift GB190804874

• DATUM: 03.03.1909
• TITEL: Improvements in Adding and Subtracting Machines.
• PERSON: SCHOOLING WILLIAM