Patent:GB468257

Brevetto:	GB 468257
Titolo:	Improvements in Slide Rule calculators, other scale devices, and direction drawing instruments
Data:	01.07.1937
Luogo:
Nazione:	Gran Bretagna
Persona:	Boardman, Hubert (P) & Clayton, Albert Edmund (P) & Naylor, Felix Samuel (P)
Ditta:	Thornton (P) Ltd
Link interni:	Rechenschieber
Keywords:
Link al brevetto: (without guarantee)	GB468257

Aus der Patentschrift GB468257

DATUM: 01.07.1937
TITEL: Improvements in slide rule calculators, other scale devices, and direction drawing instruments
PERSON: HUBERT BOARDMAN

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