Electrographic apparatus
US4649232A · kind A · utility
36Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1985 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Jun 7, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04113
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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 resistive layer through rows of electrodes. Improved accuracy is achieved through the use of electrodes at the ends of the electrode rows and through the use of an enhanced conductivity region which also allows the boundary of the active area to be placed in close proximity to the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.