Single-hand computer keyboard
Patent 4823294 Issued on April 18, 1989. Estimated Expiration Date: 
August 28, 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.
August 28, 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 717966 3833765 Single-hand digital calculator Portable word-processor Keyboards including color coding and one handed operation Multi-modal educational and entertainment system Patent #: 4668194 InventorApplicationNo. 06/901431 filed on 08/28/1986US Classes:708/142, Including specific keyboard-type information entry178/19.04, Pressure stylus341/23, Variable key legends400/486Key-board arranged according to character locationExaminersPrimary: Harkcom, Gary V.Assistant: Nguyen, Hoang International ClassesG06F 3/023 (20060101)H01H 13/84 (20060101) H01H 13/70 (20060101) AbstractA miniaturized single-hand keyboard for computers or electronic word processing systems comprising alphabetical, numerical, and programmable keys. The keyboard is used in conjunction with a keypointer which presses any of the keys on the keyboard. The keypointer has a number of keys such as a shift key, control key and an alternate key, which are activated by pressure of the thumb or the index finger.Other References
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