Computer graphics system electronically simulating painting on canvas
Patent 5239292 Issued on August 24, 1993. Estimated Expiration Date: 
August 1, 2011. 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 1, 2011. 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 ReferencesVideo image creation system which simulates drafting tool Method and means for automatically variably controlling display parameters Position control apparatus Inertial mouse system Graphics input apparatus Switch display encoder apparatus Patent #: 4908791 InventorAssigneeApplicationNo. 742143 filed on 08/01/1991US Classes:345/441, Shape generating345/179StylusExaminersPrimary: Brier, JefferyAttorney, Agent or FirmForeign Patent References
International ClassG09G 005/00Foreign Application Priority Data1988-10-04 GBAbstractA graphics system comprises an input device, and a computer for detecting changes in the position of the input device relative to a surface, and a monitor (63) for displaying patterns which follow the movement of the input device. The computer calculates at least one differential derivative with respect to time of the input device position and controls characteristics of the display patterns in dependance upon the or each calculated derivative.Other References
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