Robert Lechner
36Patents
9h-index
36Co-inventors
75Inventor score
Filing activity: Jun 24, 1974 → Oct 19, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5487665A | Video display system and method for generating and individually positioning high resolution inset images | Physics | 44 | Expired |
| US5746599A | Modular video display system | Physics | 28 | Expired |
| US5927985A | Modular video display system | Physics | 21 | Expired |
| US4881226A | Digital interface of an integrated subscriber line interface circuit | Electricity | 21 | Expired |
| US3938105A | Sequentially encoded data structures that support bidirectional scanning | Physics | 16 | Expired |
| US5274694A | Radio communication network based on digital local exchanges | Electricity | 14 | Expired |
| US4905227A | Circuit for subscriber line interface circuits in a digital time-division multiplex communication switching center | Electricity | 14 | Expired |
| US6190172A | Modular video display system | Physics | 14 | Expired |
| US4378472A | Two to four wire hybrid circuit arrangement for a pulse code modulated time multiplex telecommunication system | Electricity | 11 | Expired |
| US4715058A | Protective circuit for the overvoltage protection of a subscriber line interconnect circuit | Electricity | 9 | Expired |
| US4320260A | Circuit arrangement for determining the connection condition of a subscriber line in a telecommunications network | Electricity | 9 | Expired |
| US4720845A | Protective circuit for the overvoltage protection of a subscriber line interconnect circuit | Electricity | 9 | Expired |
| US5274692A | Method for testing the line connection before switching from a telephone switching center to be placed out of service to a new digital telephone switching center to be placed into service | Electricity | 8 | Expired |
| US4468651A | Method for eliminating the zero point error in an iterative analog-digital converter | Electricity | 7 | Expired |
| US4297531A | Circuit for suppressing noise influences in the evaluation of signal states on transmission lines | Electricity | 6 | Expired |
| US4415881A | Digital-to-analog converter | Electricity | 6 | Expired |
| US6009085A | Arrangement for the synchronization of the radio transmission in a radiotelephone subscriber connection network | Electricity | 6 | Expired |
| USD462559S1 | Compact disc rack | General | 4 | Expired |
| US4327253A | Circuit arrangement for consecutively monitoring operating conditions of direct current devices | Electricity | 3 | Expired |
| US8043909B2 | Porous semiconductive film and process for its production | Emerging Cross-Sectional Technologies | 3 | Active |
| US4309766A | Arrangement for subscriber circuits utilizing digital time division multiplex telecommunication installations and particularly for PCM local exchanges | Electricity | 3 | Expired |
| US4651110A | Circuit arrangement for zero point balancing of an integrated operational amplifier | Electricity | 3 | Expired |
| US4301334A | Telecommunication subscriber line access circuit with ground key and insulation fault indication | Electricity | 2 | Expired |
| US4284853A | Telecommunication subscriber line access circuit with ground key indication and a device for call signal generation | Electricity | 2 | Expired |
| US6005875A | Public communications service with multiple access use of trunk links | Electricity | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.