Cordless digital graphics input device
Patent 4550250 Issued on October 29, 1985. Estimated Expiration Date: 
November 14, 2003. 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 14, 2003. 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 3128340 3602903 3626483 3790709 3857022 3886311 3901604 3911215 Direction-sensing virtual aperture radiation detector Position determining apparatus and transducer therefor InventorsAssigneeApplicationNo. 06/551147 filed on 11/14/1983US Classes:250/208.2, Plural photosensitive nonimage detecting elements178/18.09, Optical250/221, Controlled by article, person, or animal250/227.11, Light conductor250/237R, Hoods, grating, baffles, diaphragms, masks345/158, Including orientation sensors (e.g., infrared, ultrasonic, remotely controlled)356/3.14, Using at least a pair of viewing axes356/620, Special mark or target on objectD14/420Scanner or bar code readerExaminersPrimary: Westin, Edward P.Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)AbstractA cordless graphics input device system for use with a computer. The device comprises an infrared emitting module useable on any surface adjacent a detector having a pair of patterned concave sensors. Coordinate information is determined via a detector contained microprocessor relative to the sensed analog position data.Field of SearchControlled by article, person, or animal | |
