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| Number | Title | Issue Date |
| 5451723 | Acoustic wave touch panel for use with a non-active stylus An acoustic wave touch panel is shown for use with a non-active stylus. The acoustic wave touch panel includes an acoustic wave touch position sensor with an elastomeric substrate 20 overlying the touch position sensor and further including a stiff substr... | 09/19/1995 |
| 5308936 | Ultrasonic pen-type data input device A computer data input device is provided which is characterized by a wireless pen for moving over the surface of a tablet. The pen will simultaneously emit magnetic pulses and ultrasonic pulses. The tablet will be equipped with a magnetic detection coil a... | 05/03/1994 |
| 5239139 | Ultrasonic digitizer pen having integrated ultrasonic transmitter and receiver An ultrasonic digitizer pen includes an ultrasonic transmitter to transmit ultrasonic waves through the air, to illuminate a writing surface. An ultrasonic receiver receives the waves reflected off the illuminated writing surface. The writing surface is a... | 08/24/1993 |
| 5177472 | Vibrating input pen used for a coordinate input apparatus A vibrating input pen used for a coordinate input apparatus for detecting a coordinate of an input position of a vibration by detecting the vibration input from the vibrating input pen to a vibration transmitting plate includes a vibration generating elem... | 01/05/1993 |
| 5073685 | Coordinate input apparatus and a wireless input pen A coordinate input apparatus includes a wireless vibrating input pen for alternately generating a first vibration having a first frequency and a second vibration having a second frequency different from the first frequency. A vibration transmitting member... | 12/17/1991 |
| 4931965 | Coordinates input apparatus A coordinates input apparatus, for example, a digitizer, has a vibration propagation medium such as a transparent glass plate for allowing a vibration to propagate therethrough; an input pen for applying vibration to the vibration propagation medium; a vi... | 06/05/1990 |
| 4891474 | Sparking stylus for acoustic digitizer An improved stylus is disclosed for generating acoustic wave energy for use in an acoustic digitizer system wherein an operator-designated stylus position is determined from measurements performed on acoustic energy generated at the stylus. A stylus body ... | 01/02/1990 |
| 4887245 | Coordinates input apparatus A vibration which is input to a vibration propagating plate by a vibration pen is detected by vibration sensors attached at corner positions of the plate. This vibration is propagated as elastic waves in the vibration propagating plate and reaches the sen... | 12/12/1989 |
| 4853496 | Acoustic coordinate input device using a roughened surface to attenuate the surface wave component A coordinates input device comprises vibration means for generating vibration, a pin having an end to which the vibration generated by said vibration means is transmitted, and a vibration transmission plate having a roughened surface or resin coating on a... | 08/01/1989 |
| 4845684 | Acoustic contact sensor for handwritten computer input An acoustic contact sensor for handwritten computer input is disclosed herein. The contact sensor comprises ultrasonic sending transducer means, receiving transducer means and circuit means for providing a logic signal to a computer when contact is made. ... | 07/04/1989 |
| 4814552 | Ultrasound position input device This invention is an input device, or stylus, for entering hand drawn forms into a computer comprising a writing instrument, a pressure switch for determining whether the instrument is in contact with the writing surface, an acoustic transmitter for trian... | 03/21/1989 |
| 4777329 | Graphic input system A graphic input system determining position coordinate data of a mobile element on a writing surface by measuring the transit times of ultrasonic signals and an electromagnetic signal. The mobile element may comprise either a writing instrument or an eras... | 10/11/1988 |
| 4758691 | Apparatus for determining the position of a movable object The apparatus contains two fixed ultrasound transmitters, an ultrasound receiver forming part of the movable object, and a calculator. A trigger signal from the calculator releases ultrasonic pulses on the ultrasound transmitters and the calculator determ... | 07/19/1988 |
| 4564928 | Graphical data apparatus The disclosure is directed to an apparatus for determining position in a data space. A generally flat tablet is provided, the tablet being formed of a solid acoustically-conductive material. A movable element, such as a stylus, is adapted to be manually m... | 01/14/1986 |
| 4488000 | Apparatus for determining position and writing pressure The disclosure is directed to an apparatus for determining position in a data space. A generally flat tablet is provided, the tablet being formed of a solid acoustically-conductive material. A movable element, such as a stylus, is adapted to be manually m... | 12/11/1984 |
| 4246439 | Acoustic writing combination, comprising a stylus with an associated writing tablet An acoustic writing combination, includes a stylus with an associated writing tablet. The stylus is provided with two ultrasonic sound sources which upon contact of the stylus with the writing tablet emit pulse-shaped sound signals which are picked up by ... | 01/20/1981 |
