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| Number | Title | Issue Date |
| 7113174 | Coordinate inputting/detecting apparatus and method designed to avoid a trailing phenomenon A coordinate inputting/detecting apparatus in which a designating device for designating a position in a flat or substantially flat two-dimensional coordinate inputting/detecting area of the coordinate inputting/detecting apparatus is judged as located in a predeter... | 09/26/2006 |
| 6970581 | Information processing apparatus and method, computer-readable memory, and program An information processing apparatus detects the sampling rate of a coordinate input device, and standardizes the writing data which is input from the coordinate input device based on the detected sampling rate. The standardized writing data is further used for signa... | 11/29/2005 |
| 5977957 | Adaptive sampling of touch screen input A touch screen input device includes a display screen adapted for receiving a touch input from a user; mechanism for sampling the touch screen input at any one of a plurality of sampling rates; mechanism for storing a predetermined sampling rate for each ... | 11/02/1999 |
| 5859392 | Method and apparatus for reducing noise in an electrostatic digitizing tablet A method for reducing the effect of a noise impulse in a digitizing panel which includes a resistive layer is disclosed. The method includes the steps of generating a signal when an object is in proximity to the digitizing panel, amplifying the signal wit... | 01/12/1999 |
| 5837947 | Method and apparatus for reducing noise in an electrostatic digitizing table A digitizing panel responsive to a signal transmitted from a stylus for generating stylus position information is disclosed. The digitizing panel includes a coordinate generator for determining coordinate data indicative of a position of the stylus relati... | 11/17/1998 |
| 5777604 | Touch panel input apparatus performing a sampling operation intermittently A touch panel input apparatus has a touch panel which consists of X- and Y-direction electrode panels. When the apparatus is in a power-off state, one end of the X electrode panel is intermittently connected to a power source and one end of the Y electrod... | 07/07/1998 |
| 5736980 | Coordinate inputting apparatus with shared line combinations of power, position and switch signals A coordinate inputting apparatus has a separating circuit, a cable and a position indicating pen. The separating circuit has a low pass filter for removing an alternating current component from a signal transmitted to a signal line and a band pass filter ... | 04/07/1998 |
| 5568409 | Tablet with system power saving features including reactivation by pen contact after inactive period A tablet system has an improved operation for saving power. During a digitizing period, the tablet supplies power to resistive sheets that produce analog pen position signals and to the sample and hold circuit and the analog to digital converter that oper... | 10/22/1996 |
| 5561447 | Coordinate input apparatus A coordinate input apparatus in which by indicating a desired position on a coordinate input surface by an input pen, coordinate value data of the indicated position is detected and output, includes: an output device to output the coordinate value data; a... | 10/01/1996 |
| 5497176 | Method of transferring detailed data by tablet driver When a tablet driver is used, an application program is capable of utilizing detailed data transmitted from a tablet. The application program issues a request that the tablet driver transfer detailed data only when it requires the detailed data, this tran... | 03/05/1996 |
| 5428192 | Method and apparatus for finding the location of a pointing instrument on a tablet A method and apparatus for producing a digital number representing the location of a pointing instrument with respect to a plurality of spaced conductors is disclosed. The instrument has a coil unit which produces an alternating magnetic field for inducin... | 06/27/1995 |
| 5327163 | Display integrated type position reading apparatus A display integrated type position reading apparatus includes a display device driven for display in accordance with a driving signal in synchronization with a predetermined clock signal, and a conductive tablet mounted on a display screen of the display ... | 07/05/1994 |
| 5225636 | Apparatus and method for digitizer point sampling and validation An apparatus and method for digitizer sampled point validation which compares charge and discharge voltages across a capacitive element within the digitizer or a filter coupled between the digitizer and an analog-to-digital convertor to accept or reject t... | 07/06/1993 |
| 5223677 | Handwriting capture device with insertable form interface A handwriting capture device which employs an insertable form interface over a digitizer to minimize or eliminate the need for a display. The form may include a menu corresponding to a repetitive task, a keypad, or a place for a signature. The form may be... | 06/29/1993 |
| 5066833 | Low power sensing apparatus for digitizer tablets A digitizer tablet consuming less power than is required of current tablets comprises short duration fast rise time energizing pulses, and a resonant circuit in the induced signal detector tuned to the frequency of the pulse repetition rate or preferably ... | 11/19/1991 |
| 4990726 | Digitized controller for position locator A digitizer tablet uses sequenced wire addressing to derive time-related voltages correlated to the location of the addressed wires. The voltages are digitized, and an algorithm followed to determine by interpolation the exact position of a pointing devic... | 02/05/1991 |
| 4918263 | Co-ordinate measuring system A co-ordinate measuring system determines the position of a coil member relative to a grid member defined by a set of equidistant, parallel conductors associated with a co-ordinate axis of the system. The system includes a switching circuit that is constr... | 04/17/1990 |
| 4713496 | Coordinate input device A coordinate input device is disclosed according to the invention, there is provided a plurality of conductors embedded in parallel on an input plane, scanning signals are supplied sequentially in such a manner of applying concurrently signals of the same... | 12/15/1987 |
| 4700022 | Method and apparatus for determining the coordinates of a contact point on a resistive type semianalog sensitive surface A method and apparatus for determining the coordinates of a point of contact of an object on a semianalog sensitive surface. The coordinates are of a zone of contact of a conductive object such as a finger on a sensitive surface. The surface consists of a... | 10/13/1987 |
| 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 |
| 4646351 | Method and apparatus for dynamic signature verification The subject invention relates to a new and improved method of dynamic signature verification. In accordance with the subject invention output signals, generated by a stylus, are normalized such that they are insensitive to the rotational position of the s... | 02/24/1987 |
| 4603231 | System for sensing spatial coordinates A system for sensing the spatial position of a moveable object with respect to an energized conductive surface whereby the spatial coordinates of the object are determined. The system provides a means of accurately measuring the coordinates of the object ... | 07/29/1986 |
| 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 |
| 4344135 | Dynamic creation of signatures In order to verify the authenticity of the signature of an individual, first a sample signature is written with a pen which can generate electrical signals representative of the forces exerted in the plane of the paper in the process of writing. These sig... | 08/10/1982 |
| 4340777 | Dynamic position locating system A position locating system for calculating the coordinates of a localized force applied to a surface (101a) has force sensing devices (101, 501, or 501a) for supporting the surface (101a). The force sensing devices provide force proportional electrical si... | 07/20/1982 |
| 4306110 | Apparatus for determining planar coordinates A pair of overlapping, normally spaced conductive sheets (16,18) have sufficient flexibility between them to permit electrical contact when touched. One sheet has spaced, approximately parallel electrodes (20,21). The other sheet has spaced approximately ... | 12/15/1981 |
| 4206314 | Graphic digitizer An X-Y coordinate position locating or measuring digitizing device in which a cursor (inductor), moveable within an electromagnetic field generated by successively activated grid wires, develops a voltage from the field, and, in conjunction with condition... | 06/03/1980 |
| 4156911 | Dynamic re-creation of signatures In order to verify the authenticity of the signature of an individual, first a sample signature is written with a pen which can generate electrical signals representative of the forces exerted in the plane of the paper in the process of writing. These sig... | 05/29/1979 |
| 4083042 | Continuous quantitative signal-display system using light-emitting elements A thermometer or bouncing-ball LED display system provides a fast response, easily readable, quantitative indication of a variable. A received analog signal, representing the variable to be displayed, is effectively compared with an analog signal represen... | 04/04/1978 |
| 4039747 | Apparatus for converting the position of a manually operated instrument into an electrical signal An improved apparatus capable of converting the position of a pen-type sensor relative to the surface of a writing table into an electrical signal representative of such position and which may be utilized for control, data input or transmission purposes. ... | 08/02/1977 |
