Touch entry interactive cathode ray tube arrangement
Patent 4198623 Issued on April 15, 1980. Estimated Expiration Date: 
November 13, 1998. 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 13, 1998. 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 3047723 3441722 3478220 3673327 3707715 3860754 Mosaic infrared sensor Patent #: 4053773 InventorsAssigneeApplicationNo. 05/960142 filed on 11/13/1978US Classes:345/175, Including optical detection250/221, Controlled by article, person, or animal341/20BODILY ACTUATED CODE GENERATORExaminersPrimary: Trafton, David L.Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)AbstractA display employing a horizontal and vertical grid of parallel infrared light beams in front of a cathode ray tube (CRT) face wherein a finger or other object may be placed against the face of the CRT to mark a spot thereon and the spot so marked will be detected by the interrupted beams. Infrared sources and detectors are located around the periphery of the CRT face and operate in different planes to more closely follow the curvature of the CRT face and thereby minimize parallax errors. | |
