Willi Studer AG
23Patents
0Active
23Granted
31Portfolio score
Filing activity: Jan 21, 1983 → Sep 5, 1990
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4622598A | Method of recording odd and even words of one channel PCM signals in plural tracks | Physics | 49 | Expired |
| US4564918A | Method and apparatus for measuring the time difference between two sampling times | Electricity | 31 | Expired |
| US4700712A | Method for determining the starting point and the end point of closed spatial signal patterns | Human Necessities | 25 | Expired |
| US4825398A | Method and apparatus for converting an input scanning sequence into an output scanning sequence | Electricity | 24 | Expired |
| US4780892A | Scanning frequency synchronization method and apparatus | Physics | 20 | Expired |
| US4644546A | Method of digital signal transmission | Electricity | 18 | Expired |
| US4922920A | Process and apparatus for processing signals from a physiologically produced electric field | Human Necessities | 13 | Expired |
| US4620238A | Method and apparatus for recording and replay of digital audio data | Physics | 11 | Expired |
| US4562489A | Apparatus for recording of digital data | Physics | 11 | Expired |
| US4908771A | Method of, and apparatus for, processing distorted pulsed signals | Physics | 8 | Expired |
| US4591926A | Technique for editing interleaved digital audio data | Physics | 7 | Expired |
| US4980921A | Magnetic system for dynamic loudspeaker | Electricity | 5 | Expired |
| US4821298A | Method and apparatus for reproducing digitized signals | Physics | 5 | Expired |
| US4935823A | Method of, and apparatus for, identifying a predetermined location within a data sequence on a record carrier for processing the data sequence | Physics | 4 | Expired |
| US4709278A | Method and apparatus for producing and selectively equalizing a temporal relationship between series of digital signals | Physics | 4 | Expired |
| US4727547A | Method and apparatus for decoding | Physics | 4 | Expired |
| US4672527A | Method and apparatus for supplying a system for processing electrical signals | Electricity | 4 | Expired |
| US4567443A | Low-distortion audio amplifier circuit arrangement | Electricity | 3 | Expired |
| US4849837A | Method of, and apparatus for, recording audio signals using recording signals free of audio frequencies | Physics | 2 | Expired |
| US5134041A | Magnetic storage medium containing at least two different populations of magnetic particles each population having a separate mean coercive field strength | Physics | 2 | Expired |
| US4571529A | Actual speed value converter for the speed control in a motor drive system | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4847702A | Method and apparatus for converting a binary signal | Physics | 0 | Expired |
| US4818923A | Method of, and apparatus for, regulating the rotational speed of an electric motor in a four quadrant mode of operation | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.