Input apparatus for design work on an image-bearing screen
Patent 4763116 Issued on August 9, 1988. Estimated Expiration Date: 
August 9, 2005. 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 9, 2005. 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 ReferencesTracing aid for computer graphics Patent #: 4561183 InventorApplicationNo. 06/759587 filed on 07/25/1985US Classes:345/184, Mechanical control (e.g., rotatable knob, slider)345/157Cursor mark position control deviceExaminersPrimary: Caldwell, Sr., John W.Assistant: Queen, Tyrone Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)Foreign Application Priority Data1984-07-30 DEAbstractAn input device for design work on image-bearing screens with which, by analogue-type hand movements which are identical in direction and magnitude with the requirements sought, graphics can be generated as in a conventional manner with a drafting head, and straight-edge and dividers.Other References
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