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| Number | Title | Issue Date |
| 4853493 | Electrographic apparatus The electrographic apparatus of a variety wherein a transparent resistive layer is deposited upon an insulative substrate in a manner wherein a rectangularly-shaped resistive layer region is developed having a predetermined conductivity. A conduction band... | 08/01/1989 |
| 4827084 | Solid state image detector and signal generator A solid state, touch sensitive position sensor, which sensor includes a conductive surface along the boundaries of which are disposed at least two sets of two elongated current distribution and collection means. The touch sensitive position sensor further... | 05/02/1989 |
| 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 |
| 4801771 | Force sensitive device There is provided a force sensitive device comprising a first conductive layer, a second conductive layer resiliently deformable to come into contact with the first conductive layer, a certain level of voltage being applied across the first and second con... | 01/31/1989 |
| 4801767 | Coordinate inputting sheet with auxiliary electrodes promoting accuracy of positional detection In this coordinate inputting sheet, there are provided an X coordinate inputting sheet for detecting an X coordinate and a Y coordinate inputting sheet for detecting a Y coordinate. These X coordinate and Y coordinate inputting sheets are laid together wi... | 01/31/1989 |
| 4798919 | Graphics input tablet with three-dimensional data A graphics input tablet has a conductive layer and a resistive layer with contacts (16,17,23,24) arranged one along each edge of the resistive layer. The conductive layer is held at a negative potential relative to the resistive layer so current flows in ... | 01/17/1989 |
| 4797514 | Touch sensitive device with increased linearity An electrographic touch sensor of simplified construction having an increased proportion of area for providing linear output signals. The sensor utilizes a resistive layer of a substantially uniform resistivity throughout. A resistance element of resistan... | 01/10/1989 |
| 4788384 | Device for two-dimensional localization of events that generate current on a resistive surface Electrodes are placed at the periphery of a resistive surface to pick up a current generated at a point on the resistive surface. Each electrode is connected to at least three summing lines via respective resistors each having a fixed resistance value whi... | 11/29/1988 |
| 4777328 | Circular electrographic touch sensor with orthogonal fields and linear response A circular touch sensor having very linear response in a two coordinate system. This circular sensor has four substantially identical and symmetrical quadrants, with points for the introduction of potentials being located at polar and equatorial points on... | 10/11/1988 |
| 4752655 | Coordinate input device A transparent coordinate input device can be used integrally with a display unit or overlap it and has a coordinate input panel (i.e., a transparent drawing pad). The input panel has a transparent insulating substrate, a flat transparent resistor film of ... | 06/21/1988 |
| 4745240 | See-through coordinate graphic input tablet The see-through coordinate input tablet is formed of two oppositely facing elements each made of a transparent substrate provided with fine metal wires running in parallel on the inward surface of the substrate, the running directions on the two substrate... | 05/17/1988 |
| 4745242 | Coordinate input sheet with correction electrodes A coordinate input sheet for use in a coordinate digitizer apparatus has at least one auxiliary electrode disposed between and in parallel with main electrodes provided at opposite ends of a resistance surface. The auxiliary electrode is used to either me... | 05/17/1988 |
| 4731508 | Electrographic tough sensor having reduced bow of equipotential field line therein A resistor electrode type touch sensor having enhanced area of linear response by reducing the bow in perimeters of the sensor. Within a resistive layer of substantially uniform resistivity orthogonal electrical fields are produced to give coordinates of ... | 03/15/1988 |
| 4720607 | Tactile screen for determining the coordinates of a point on a surface A tactile screen for determining the coordinates of a point on a surface is formed by a support of glass, for example, which carries relatively spaced conductive strips made up of emitting and receiving strips in interjacent relation. The screen is intend... | 01/19/1988 |
| 4707845 | Touch panel with automatic nulling A touch panel has panel scanning signals selectively applied to the four sides of a touch sensing surface of the panel so as to establish alternating current voltage gradients in desired directions across the touch sensing surface. When the panel is touch... | 11/17/1987 |
| 4707570 | Manual information input device A manual information input device allows the user to manually enter desired information using a readily available writing instrument such as a pencil rather than a specially designated input stylus such as a light pen or an electromagnetic pen. The manual... | 11/17/1987 |
| 4689447 | Graphical input device with rules A graphical input device having lines or rules visible through an input surface of a flexible sheet. The flexible sheet is at least partially transmissive to light and is located to face a base plate. The front surface of the flexible sheet is for enterin... | 08/25/1987 |
| 4687885 | Electrographic touch sensor with Z-axis capability An electrographic touch sensor having Z-axis capability. In one embodiment, a uniform resistive coating is applied to one surface of a substrate and it is within this coating that orthogonal electrical fields are produced using suitable electrodes and vol... | 08/18/1987 |
| 4680429 | Touch panel A touch panel has panel scanning signals selectively applied to the four sides of a touch sensing surface of the panel so as to establish alternating current voltage gradients in desired directions across the touch sensing surface. When the panel is touch... | 07/14/1987 |
| 4678869 | Position responsive apparatus, system and method having electrographic application A position responsive apparatus, system and method which employs a position responsive surface formed of two orthogonally disposed arrays of grid elements which in one embodiment, the elements are coupled along one border with a resistor chain or the equi... | 07/07/1987 |
| 4665283 | Electrographic apparatus An electrographic apparatus or digitizer has a resistive layer with an active area which operates in conjunction with a stylus or other suitable position locator. An a.c. source or alternatively a signal treatment means is connected to the resistive layer... | 05/12/1987 |
| 4661655 | Electrographic touch sensor and method of reducing bowed equipotential fields therein A resistor electrode type touch sensor having enhanced area of linear response by reducing the bow in perimeters of the sensor and the method of accomplishing the same. A resistive coating is applied to one surface of a substrate. Within this coating orth... | 04/28/1987 |
| 4659873 | Fabric touch sensor and method of manufacture A fabric touch sensor for providing positional information related to a touched region/points. The improved electrographic touch sensor (10) is fabricated using at least one resistive fabric layer (12) in the form of conducting threads. This fabric is con... | 04/21/1987 |
| 4650926 | Electrographic system and method An electrographic system and method having a control which carries out correction for graphic surface non-linearities. The control employs a procedure wherein a correction look-up table is developed as part of the manufacture of the device wherein output ... | 03/17/1987 |
| 4649232 | Electrographic apparatus An electrographic apparatus and system utilizing a resistive layer having an active area which operates in conjunction with a stylus or tracer or other suitable position locator. An a.c. source or alternatively a signal treatment means is connected to the... | 03/10/1987 |
| 4644101 | Pressure-responsive position sensor Electrical signals are produced by a pressure-responsive device, such signals being indicative of the position of locally applied pressure. The device comprises a position sensor assembly which comprises a composite layer medium including electrically con... | 02/17/1987 |
| 4638118 | Writing pad A writing pad in which a grid of electrical elements defines an array of discrete locations on the writing surface with a density of at least 100×50=5000 locations per square inch, and digital circuitry is connected to the grid to determine the locations... | 01/20/1987 |
| 4622437 | Method and apparatus for improved electronic touch mapping An improved touch-panel and method of increasing the percentage of useful area of a touch-sensitive panel include electrode elements in electrical communication with an electrically conductive layer of known spatial impedance characteristics. The touch-pa... | 11/11/1986 |
| 4620062 | Device for forming signals which are characteristic of the position of a point determined on a surface The device consists of two superimposed substrates (1 and 5) each carrying a grid of orthogonal conductive tracks (2 and so forth) facing each other from grid to grid and kept at a distance from each other by spacing rods (4). The tracks of each grid are ... | 10/28/1986 |
| 4616106 | Graphic tablet and method A writing tablet system is disclosed incorporating a plurality of parallel conductors imbedded beneath the surface thereof arranged in two groups in orthogonal relationship with respect to each other. The conductors form an antenna grid for receiving radi... | 10/07/1986 |
| 4603230 | Graphical input terminal A graphical input terminal for generating an electrical signal representative of a location on an input surface, with respect to a pair of coordinates, in which a character, figure or like graphical information is written by hand. A first resistive film i... | 07/29/1986 |
| 4602126 | Two-dimensional coordinate detecting apparatus A two-dimensional coordinate detecting apparatus for use, e.g. over a CRT screen, is arranged such that a potential gradient layer is spaced from a detector layer, one of which is formed of a plurality of fragmentary strips. At a depressed position, the p... | 07/22/1986 |
| 4600807 | Electrographic apparatus An electrographic apparatus utilizing a resistive layer which operates in conjunction with a stylus or tracer. Either the resistive layer or the cursor may be excited from an a.c. source to develop coordinate-defining electrical signals. A sequence of bor... | 07/15/1986 |
| 4575581 | Digitizer and position encoders and calibration system for same Digitizer incorporates two novel position encoders. One position encoder comprises means for periodic spatial calibration against an accurate pattern of reference marks, thereby improving accuracy to the limit of resolution. Optionally, it also includes t... | 03/11/1986 |
| 4575580 | Data input device with a circuit responsive to stylus up/down position A data input device includes a pair of resistive sheets positioned so as to overlap one another to define a common writing area. These sheets are separated from one another by a layer of material that is only electrically conductive under pressure. An ene... | 03/11/1986 |
| 4571577 | Method and apparatus for determining the coordinates of a point on a surface A screen is disclosed on the surface of which a certain number of resistant conducting emitter strips and insulated conducting receiver strips are laid, the emitter strips being parallel-mounted with the terminals of a voltage generator and the receiver s... | 02/18/1986 |
| 4570149 | Simplified touch tablet data device A touch tablet is provided containing two sheets of insulating material each of which contains a plurality of spaced apart conductive lines. A resistive strip on each sheet contacts and connects electrically one end of each of the plurality of conductive ... | 02/11/1986 |
| 4568798 | X-Y Position detector An x-y position detector is shown which comprises a pen and contact plate with a resistive layer formed thereon. Point electrodes are provided on the four sides of the resistive layer. The materials of the resistive layer and the pen are selected such tha... | 02/04/1986 |
| 4558757 | Position coordinate input device A position coordinate input device including an input plate subjected, at a point, to an external force with a finger, etc. so as to input data of coordinates of the point into a computer and the like. The device further includes four elastic support memb... | 12/17/1985 |
| 4523654 | Electrographic system An electrographic system utilizing a transparent resistive layer which operates in conjunction with a stylus or cross hair cursor excited from an a.c. source to develop coordinate defining electrical signals. Through the utilization of a sequence of borde... | 06/18/1985 |
