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Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US42583563 Apr 197824 Mar 1981SCM CorporationMulti bar encoding apparatus utilizing acoustic energy
US431667431 Mar 198023 Feb 1982International Business Machines CorporationKeylever pawl tube spring and keyboard utilizing a keylever pawl tube spring
US479588813 Jul 19873 Jan 1989A & K MacFarlane Pty. Ltd.Variable keystroke pressure apparatus
US485059117 Nov 198725 Jul 1989Capcom Co., Ltd.Pneumatic operating device for game machine
US48824599 Dec 198821 Nov 1989Square D CompanyPressure sensitive switch having rugged construction and accurate trip pressure settings
US49909009 Jun 19885 Feb 1991Alps Electric Co., Ltd.Touch panel
US525279624 Feb 199212 Oct 1993Signal tube operated switches
US574224219 Dec 199621 Apr 1998Compaq Computer CorporationKeyboard using pressurized fluid to generate key stroke characteristics
USRE3241927 Jan 198612 May 1987Engineering Research Applications, Inc.Molded keyboard and method of fabricating same