Keyboard Patents

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A gallery of patents that describe technologies or illustrate designs relating to IBM and family keyboards, typewriters and keypunches. This includes keyswitch/actuator designs, ornamental designs (overall appearance), integrated pointing devices such as TrackPoints, and host systems such as PCs, laptops, terminals, consoles and electronic typewriters. All illustrations provided are from the patents themselves, which are believed to be within the public domain. A total of 112 patents have been recorded. The patent list is currently filtered to 1 patent(s).

U.S. Utility Patent 5,120,923 (US5120923A)

Patent diagrams depicting Alps' Push button switch at rest (left) and pressed (right)

Applied 18 Sep 1990

Published 9 Jun 1992

Expired 18 Sep 2010

More info

Name	Push button switch
Inventors	Takafumi Kato, Kazutoshi Watanabe
Assignees	Alps
Description	An invention of a keyswitch that uses a click rubber (buckling rubber sleeve) and an S-shaped plastic actuator that can uniformly compress it. This was implemented as Alps KFNR buckling sleeves and was used for the IBM KeyPad III.