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| Number | Title | Issue Date |
| 5004871 | Digitizer stylus having side switch A stylus having a pressure sensitive side switch for use with digitizer apparatus is disclosed. The pressure sensitive side switch is activated by the application of pressure thereto substantially normal to the axis of the stylus by the finger of a user. ... | 04/02/1991 |
| 4992630 | Digitizer tablet with user customization of stylus proximity and pressure A digitizer tablet provided with menus over the marginal areas in the non-linear boundaries of the regular electrode array. Coordinate signals from the menu areas are processed to vary a parameter of the processing circuitry for the coordinate value outpu... | 02/12/1991 |
| 4961138 | System and apparatus for providing three dimensions of input into a host processor A system under the hand held control of a user for providing three dimensions of input to a computer processor while operating on an essentially planar surface is disclosed. The system of the invention generally comprises: an apparatus operated over a sub... | 10/02/1990 |
| 4823294 | Single-hand computer keyboard A miniaturized single-hand keyboard for computers or electronic word processing systems comprising alphabetical, numerical, and programmable keys. The keyboard is used in conjunction with a keypointer which presses any of the keys on the keyboard. The key... | 04/18/1989 |
| 4822957 | Electrographic touch sensor having reduced bow of equipotential field lines therein A resistor electrode type touch sensor having reduced bow of equipotential lines in the sensor and simplified construction. Orthogonal electrical fields are produced on a resistive surface so as to give coordinates of a selected position. Overlying, but s... | 04/18/1989 |
| 4786764 | Digitizer stylus with pressure transducer A stylus switch is activated automatically when the tip of the stylus is pressed against a digitizer tablet with sufficient force. The pressure switch includes a transducer in the form of an ink layer having electrical resistance which varies as a functio... | 11/22/1988 |
| 4707571 | Ergonomic digitizer stylus A handheld stylus for a digitizer includes a tip that is angled downward to meet the digitizing surface at almost, but not quite, a right angle. The body of the stylus is of a generally triangular cross section. Mounted upon the stylus are pushbutton swit... | 11/17/1987 |
| 4705942 | Pressure-sensitive light pen A light pen which includes a transparent rod at its pointing end through which light is directed to a photodetector that is fixedly positioned within the light pen. The rod is spring loaded and axially slidable in response to applied pressure, resulting i... | 11/10/1987 |
| 4580007 | Stylus devices responsive to pressure changes for use in videographic and like apparatus A stylus device for use in a videographic apparatus, includes a housing with a projecting stylus. In operation, pressure changes cause movement of the resiliently mounted stylus. This carries a magnet which co-operates with a Hall Effect transducer such t... | 04/01/1986 |
| 4544803 | Positional transducer A positional transducer includes a nonconductive plate having four ferrite tube inductors mounted at preselected locations in the plate. Two interconnected permanent magnets are mounted on either side of the plate with opposite poles facing the plate for ... | 10/01/1985 |
| 4493104 | Character recognition device This invention is concerned with a character recognition device which includes a writing pad having a pair of sheets with one of the sheets comprising an area of high resistivity and the other one of the sheets comprising a layer of conductive material, t... | 01/08/1985 |
| 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 |
| 4475235 | Signature verification sensor A sensor having a particular application in the field of signature verification is disclosed. In the presently preferred embodiment, two plates are disposed in a spaced apart relationship and constructed to provide a plurality of electrical capacitors. Pr... | 10/02/1984 |
| 4318096 | Graphics pen for soft displays A graphics input device for use with location indicating means to present graphic data upon a computer controlled visual display. The device includes a pen having a housing within which is disposed a conductive stylus shaft, one end extending beyond the h... | 03/02/1982 |
| 4268730 | Stylus pen actuating switch An actuating switch (30) is provided for a stylus pen (10). The actuating switch (30) includes a first contact (74) and a second contact (78). A spring (100) is disposed between the first contact (74) and the second contact (78), such that when pressure i... | 05/19/1981 |
| 4109146 | Pressure actuated light pen A pressure actuated light pen attached to the end of an optical fibre bundle has a retractable tip in which is formed an aperture. No image is focussed onto the ends of the fibres until the tip, with the aperture, is retracted to a predetermined position.... | 08/22/1978 |
| 4107540 | Pressure actuated light pen A pressure actuated light pen attached to the end of an optical fiber bundle has a retractable shutter mechanism at its forward end. The shutter mechanism comprises a plurality of wedge-shaped sections, resiliently urged in a forward direction to at least... | 08/15/1978 |
| 4078226 | Input apparatus for dynamic signature verification systems The disclosure relates to signature verification input apparatus comprising a writing instrument and platen containing piezoelectric transducers which generate signals in response to writing pressures.... | 03/07/1978 |
| 3959585 | Graphical input terminal A graphical input terminal includes a pair of resistive sheets separated by an air gap. An energizing voltage is alternately applied to each sheet while an output voltage representative of the position of contact between the sheets caused by the pressure ... | 05/25/1976 |
