Multipurpose cursor control keyswitch
Patent 4680577 Issued on July 14, 1987. Estimated Expiration Date: 
April 18, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 18, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3561280 3633724 3715933 3772597 3824354 3832895 Universally mounted, pivoted key actuctor and associated switch assembly Miniaturized calculator keyboard switch assembly having universally pivoted key actuators Three axis joystick control Input apparatus for dynamic signature verification systems InventorsAssigneeApplicationNo. 06/854687 filed on 04/18/1986US Classes:345/160, Cursor key345/168, Including keyboard400/485Key-board having multiple-character, multiple-movement keysExaminersPrimary: Caldwell, Sr., John W.Assistant: Cordell, Ruffin B. Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)AbstractA multipurpose keyswitch for controlling cursor movement on a CRT display and for character entry includes a key cap that moves laterally to provide cursor control and that moves vertically for character entry. Sensors are coupled to the key cap for sensing the lateral movement of the key cap. Forward and backward movement of the key cap selects upward and downward movement of the cursor on the CRT display. Left and right movement of the key cap selects left and right movement of the cursor. Vertical movement of the key cap selects the entry of a character. The multipurpose keyswitch is advantageously positioned as one of the home keys of the keyboard.Other References
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