51
Gary B Gordon: Method and system for tracking attitude. Hewlett Packard Company, Timothy Rex Croll, July 28, 1998: US05786804 (160 worldwide citation)

A method and system for tracking attitude of a device includes fixing a two-dimensional array of photosensors to the device and using the array to form a reference frame and a sample frame of images. The fields of view of the sample and reference frames largely overlap, so that there are common imag ...


52
Gregory L Heacock, Kyle S Johnston, Tomas E Lock, Wayde H Watters: Head mounted display system. Virtual Vision, McAndrews Held & Malloy, July 23, 1996: US05539422 (159 worldwide citation)

A head mounted display system is shown having a single optical element. The single optical element has three optical surfaces. An entrance surface receives a video image directly from a display. A reflective surface reflects the video image from the entrance surface to an exit surface wherein the us ...


53
Russell F Lewis, Floyd H Hollister, Dale A Cone: Writing tip position sensing and processing apparatus. Texas Instruments Incorporated, W Daniel Swayze Jr, Leo N Heiting, Richard L Donaldson, March 15, 1994: US05294792 (159 worldwide citation)

A self-contained pen computer is provided that is capable of acquiring data representative of written strokes of the stylus of the pen and then recognizing the symbols associated with these pen strokes, or compacting these strokes. These recognized symbols or compacted strokes are stored in a memory ...


54
Louis B Rosenberg: Providing force feedback using an interface device including an indexing function. Immersion Corporation, James R Riegel, May 9, 2000: US06061004 (158 worldwide citation)

A method and apparatus for providing force feedback including an indexing function. A force feedback interface device is coupled to a host computer system displaying a graphical environment. A position of a user-manipulated physical object in a degree of freedom, such as a planar workspace, is sense ...


55
David M Britz: Personal communicator having orientable video imaging element. AT&T, Alfred G Steinmetz, May 9, 1995: US05414444 (156 worldwide citation)

A personal communicator for use in a wireless communication network includes a wireless communications LCD and a multimedia LCD with the communications, mounded on a hinged member, and superimposed on top of the multimedia LCD. The communications LCD is sufficiently transparent to permit viewing of ...


56
Bu Chin Wang: Computer display screen monitoring system. Summit Micro Design, Fliesler Dubb Meyer & Lovejoy, May 26, 1992: US05117225 (154 worldwide citation)

A computer display screen monitoring system comprising a master station and a plurality of user stations for displaying text and graphic data appearing on one display screen in the system on one or more other display screens in the system in real time. Multiplexers are provided in each of the statio ...


57
David W Reeves: Video game and simulator joystick controller with geared potentiometer actuation. Thrustmaster, Marger Johnson McCollom & Stolowitz, July 25, 1995: US05436640 (152 worldwide citation)

A joystick controller for a video simulation system having a geared potentiometer actuation mechanism. The joystick controller comprises a base, a handle mounted on an actuation shaft, and first and second gimbals pivotally mounted on the base by pivot members for rotational movement about respectiv ...


58
Robert Charles Leah, Scott James McAllister: Interactive object selection pointer method and apparatus. International Business Machines Corporation, Edward H Duffield, September 15, 1998: US05808601 (150 worldwide citation)

An analog to a gravitation force field is generated mathematically to operate between the displayed image of the mouse selection pointer on the screen of a computer display as it interacts with defined selectable objects on the screen. Unlike true gravity, however, the force may be mathematically de ...


59
George E Gerpheide, Jack S Kelliher, Everett D Robinson: System and method for extending the drag function of a computer pointing device. Cirque Corporation, Thorpe North & Western L, May 26, 1998: US05757368 (148 worldwide citation)

A method and system for extending the distance which a user can drag a cursor across a computer display device when using a touch sensitive pointing device as a relative cursor locating device. When such relative cursor locating devices are used the small perimeter size of the position sensing surfa ...


60
Vincent Cheng: Apparatus having dual modes for controlling cursor on display screen. Primax Electronics, Christie Parker & Hale, October 10, 1995: US05457479 (147 worldwide citation)

An apparatus having dual modes and adapted to control a position of a cursor on a display screen comprises a ball capable of being put in a rotation for determining the position, a roller device in contact with the ball to detect the rotation of the ball, a shell having thereon an opening to protrud ...