Keyboard having improved keytop

Typewriting machines – Key-board or key lever-actuating mechanism – Key-board including row of keys having different heights

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400490, 400495, B41J 508

Patent

active

055607241

ABSTRACT:
A keyboard includes a keyboard body, a plurality of keys arranged in rows and columns, and switching elements for turning switching elements ON and OFF in response to operations on the plurality of keys. A special key among the plurality of keys has a keytop which is at least a stroke length of the special key higher than keytops of keys arranged in a row in which the special key is located.

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Conway, D. L., "Contoured Keyboard," IBM Technical Disclosure Bulletin, vol. 22, No. 3, Aug. 1979, pp. 1276-1277.

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