Sansui Electric Co., Ltd.
72Patents
0Active
72Granted
36Portfolio score
Filing activity: Dec 22, 1971 → Mar 19, 1991
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD246519S | Head phone | General | 103 | Expired |
| US4016366A | Compatible stereophonic receiver | Electricity | 99 | Expired |
| USD254616S | Head phone | General | 96 | Expired |
| USD247488S | Record player | General | 41 | Expired |
| USD248471S | Speaker cabinet | General | 33 | Expired |
| USD253289S | Control knob for audio apparatus | General | 29 | Expired |
| US4118605A | Coil mount structure | Electricity | 27 | Expired |
| USD249143S | Record player | General | 26 | Expired |
| USD252393S | Record player | General | 25 | Expired |
| US4058675A | Loudspeaker system for use in a stereophonic sound reproduction system | Electricity | 25 | Expired |
| US4105946A | Frequency synthesizer with phase locked loop and counter | Electricity | 19 | Expired |
| US4633483A | Near-instantaneous companding PCM involving accumulation of less significant bits removed from original data | Electricity | 18 | Expired |
| US3934086A | Matrix four-channel decoding system | Electricity | 18 | Expired |
| US5206466A | Diaphragm for speaker | Electricity | 18 | Expired |
| US4216517A | Protection circuit for power amplifier | Electricity | 16 | Expired |
| US4158795A | Brushless DC motors | Electricity | 14 | Expired |
| US4079204A | AM Stereophonic transmission system | Electricity | 14 | Expired |
| US4193076A | Coupling an outer antenna with a radio receiver having a bar antenna | Electricity | 14 | Expired |
| US4546394A | Signal reconstruction circuit for digital signals | Physics | 13 | Expired |
| USD253109S | Speaker box with removable grill | General | 13 | Expired |
| US4044855A | Loudspeaker device | Electricity | 13 | Expired |
| US4585952A | Digital waveform shaping circuit | Electricity | 12 | Expired |
| US4144463A | Stabilized DC power supply devices for providing a plurality of DC power outputs which are selectively consumed | Electricity | 11 | Expired |
| US4029906A | Automatic noise reduction system of FM stereo receiver | Electricity | 11 | Expired |
| US4626936A | Relative velocity control device for magnetic recording and reproducing apparatus | Physics | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.