Category:Otis King's Patent Calculator

Media in category "Otis King's Patent Calculator"

The following 3 files are in this category, out of 3 total.

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  Otis King cylindrical slide rules, view 1 - Ridai Museum of Modern Science, Tokyo - DSC07491.JPG 3,635 × 4,166; 7.48 MB
  
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  Otis King cylindrical slide rules, view 2 - Ridai Museum of Modern Science, Tokyo - DSC07492.JPG 4,815 × 3,648; 9.28 MB
  
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  OtisKing ModelK.jpg 194 × 1,552; 53 KB