Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 5045644 | Touch sensitive screen with improved corner response A resistor electrode type of gradient sheet for a touch sensor having reduced ripple and bow of equipotential lines along edges and in the corners of the sensor. Orthogonal electrical fields are produced on a resistive surface so as to give coordinates of... | 09/03/1991 |
| 4933660 | Touch sensor with touch pressure capability A touch sensor device, and its method of operation, that provides information as to the position of a touch thereon together with information as to the amount of pressure applied to the sensor at the touch position. The device has a pair of spaced-apart m... | 06/12/1990 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 4220815 | Nonplanar transparent electrographic sensor An electrographic sensor for the generation of coordinate signals corresponding to contacted positions on the sensor is described. This sensor is of particular value for placing in intimate contact with the nonplanar face of a cathode ray tube or the like... | 09/02/1980 |
