Nixon & Vanderhye
Ergonomical keyboard assembly
 An ergonomical keyboard assembly includes an upper cover, a lower base plate connected to the cover, and a unitary keyboard. The upper cover includes a hollow frame that confines an opening. The keyboard has a substrate mounted on the base plate below the cover, and a plurality of keys which are mounted on the substrate and which have key caps projecting upward and outward from the cover through the opening. The substrate has a top face which is arched and which protrudes upward. The key caps form an arched overall key surface that projects upward and outward through the opening and that is arched from two ends to an intermediate portion of the opening. 
Shin Jiuh Corp.
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Chin-Wen
Chou