Point and select device
Patent 4939508 Issued on July 3, 1990. Estimated Expiration Date: 
October 31, 2008. 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.
October 31, 2008. 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 D291318 Mercury switch arrangement for digital watch X-Y Position input device for display system Input device featuring both trackball and mouse capability Hand-held optical scanner and computer mouse Patent #: 4804949 InventorsAssigneeApplicationNo. 264646 filed on 10/31/1988US Classes:345/167, Trackball74/471XY, Control moves in two planes345/157Cursor mark position control deviceExaminersPrimary: Oberley, Alvin E.Assistant: Wu, Xiao Attorney, Agent or FirmInternational ClassG06F 003/033AbstractA point and select device is disclosed in which a sphere protruding from one major surface of a housing can serve as either a trackball or the moving element in a mouse. Actuators on either side of the device are selected according to the use of the device. The sense of motion for up/down is reversed between the two modes of operation. | |
