Christopher Ludeman
10Patents
4h-index
4Co-inventors
49Inventor score
Filing activity: Jan 30, 1995 → May 22, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5659570A | Circuit and method for loopback test and on-hook transmission integrated in a telephone subscriber line interface circuit | Electricity | 13 | Expired |
| US6233335A | Battery switching subscriber loop interface circuit | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6665398B1 | Programmable subscriber loop interface circuit and method | Electricity | 5 | Expired |
| US6519322B1 | Apparatus and method for testing subscriber loop interface circuits | Electricity | 5 | Expired |
| US7482853B2 | Method and apparatus for switching audio and data signals through a single terminal | Electricity | 4 | Active |
| US6931108B2 | Integrated POTS/DSL line driver with floating supply voltage | Electricity | 4 | Expired |
| US6434232B1 | Apparatus and method for measuring loop impedance | Physics | 3 | Expired |
| US7386015B1 | Digitally configurable multiplexer/de-multiplexer | Electricity | 0 | Active |
| US7020248B2 | Apparatus and method for testing subscriber loop interface circuits | Electricity | 0 | Expired |
| US7492826B2 | Bidirectional buffered interface for crosspoint switch | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.