TEAC CORPORATION
1,041Patents
155Active
1,041Granted
49Portfolio score
Filing activity: Feb 22, 1977 → May 31, 2023 · 84 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5483419A | Hot-swappable multi-cartridge docking module | Physics | 192 | Expired |
| US5596738A | Peripheral device control system using changeable firmware in a single flash memory | Physics | 134 | Expired |
| US4321635A | Apparatus for selective retrieval of information streams or items | Physics | 114 | Expired |
| US5319626A | Method for rewriting defect management areas on optical disk according to ECMA standard | Physics | 110 | Expired |
| US6784801B2 | Electric appliance monitoring system | Physics | 91 | Expired |
| US5526341A | Test disk having defect patterns uniformly distributed in recording areas | Physics | 70 | Expired |
| US6356415B1 | Disk drive head carriage lock having solenoid within frame of lock member | Physics | 55 | Expired |
| US5408369A | Power saving system for rotating disk data storage apparatus | Physics | 54 | Expired |
| US4697129A | Stepping motor drive system and method capable of stopping the rotor in a required angular position | Electricity | 54 | Expired |
| USD555169S1 | Digital audio player | General | 53 | Expired |
| US4677359A | Stepping motor drive method and system capable of stopping the rotor in a required angular position | Electricity | 49 | Expired |
| USD291196S | Combined tape recorder and audio mixer | General | 49 | Expired |
| USD597064S1 | Portable stereo recorder | General | 48 | Expired |
| US5018836A | Optical disc apparatus lens drive apparatus and method for the manufacture of such | Emerging Cross-Sectional Technologies | 48 | Expired |
| USD546814S1 | Guitar amplifier with digital audio disc player | General | 47 | Expired |
| US5231615A | Carriage fixing apparatus and disk driver having such carriage fixing apparatus | Physics | 46 | Expired |
| USD580436S1 | Transmitter | General | 45 | Expired |
| US5278815A | Digital data reproducing apparatus | Physics | 43 | Expired |
| US4688131A | Information processing apparatus having locking means permitting ready detachment of the magnetic disk drive assembly | Physics | 43 | Expired |
| US4224642A | PCM Recording and reproducing method providing for dropout compensation | Physics | 42 | Expired |
| US5099995A | Disc housing case | Physics | 42 | Expired |
| US5140478A | Magnetic disk drive comprising magnetic disk cartridge and driving device which drives the disk cartridge and prevents external vibration from being transmitted to the disk cartridge | Physics | 39 | Expired |
| USD436596S | Magnetic disc memory | General | 39 | Expired |
| US5442608A | Disk apparatus having a power consumption reducing mechanism | Physics | 38 | Expired |
| USD453327S1 | Digital audio mixer | General | 36 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.