U.S. Utility Patent 5,120,923 (US5120923A)
Provided by the ASK Keyboard Patents database
Name | Push button switch |
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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. |