Learn to type via mnemonic devices, and methods of constructing and utilizing same
Patent 4902231 Issued on February 20, 1990. Estimated Expiration Date: 
November 7, 2008. 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.
November 7, 2008. 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 1527100 1734115 2053874 3501849 Simulated keyboard system Patent #: 4580984 InventorApplicationNo. 267805 filed on 11/07/1988US Classes:434/227Keyboard operation (e.g., typing, key punching, etc.)ExaminersPrimary: Grieb, William H.Attorney, Agent or FirmInternational ClassG09B 013/00AbstractAn educational device for teaching touch typing. The device includes a chart to be place in the view of the student and a series of overlays to be used on the individual student keyboards. The chart and overlays give the student the visual and mental impressions necessary to remember the location of individual keys without having to look at the keys. | |
