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Patent
Suchergebnisse für: Thornton
- Patent:1411090 17.01.2011 Boardman, Hubert (P) A.G. Thornton (P) : Improvements in Slide Rule Calculators
- Patent:1468257 17.01.2011 Boardman, Hubert (P) & Clayton, Albert Edmund (P) & Naylor, Felix Samuel (P) Thornton (P) Ltd : Improvements in Slide Rule calculators, other scale devices, and direction drawing instruments