Collapsible typing keyboard tray
Patent 5833378 Issued on November 10, 1998. Estimated Expiration Date: 
May 29, 2016. 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.
May 29, 2016. 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 1560020 2053874 3501849 Simulated keyboard system Work station system Keyboard assembly and typing method Input keyboard apparatus for information processing device and other keyboard devices Ergonomic-interface keyboard system Reverse slope keyboard Method for teaching keyboarding InventorApplicationNo. 654902 filed on 05/29/1996US Classes:400/472, KEY-BOARD OR KEY LEVER-ACTUATING MECHANISM248/118.3, Adjustable height248/918, Ancillary device support associated with a video display screen400/715Attachment for guiding fingers or hands of typist (e.g., hand rest)ExaminersPrimary: Hilten, John S.Assistant: Grohusky, Leslie J. Attorney, Agent or FirmInternational ClassB41J 005/10AbstractA collapsible keyboard support tray has folding legs. The legs have risers to enable adjustment of the deck to a height so that the hinged tray depends at an approximate negative 25°. The deck has a height to support a wrist pad at just below the user's wrist to enable typing with a zero degree angle from the wrist to the forearm. The user adjusts his chair to create a 90° angle from his forearm to his upper arm during typing.Other References
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