Pioneer Electronic Corporation
2,994Patents
6Active
2,994Granted
47Portfolio score
Filing activity: Dec 18, 1972 → Apr 23, 2008 · 6 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5882761A | Organic EL element | Emerging Cross-Sectional Technologies | 384 | Expired |
| US6212330A | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Electricity | 353 | Expired |
| US5187589A | Multiprogram video tape recording and reproducing device | Electricity | 344 | Expired |
| US5465385A | CATV system with an easy program reservation | Electricity | 329 | Expired |
| US5416508A | CATV system with transmission of program schedules, linked program broadcasts, and permissive ordering periods | Electricity | 328 | Expired |
| US4245245A | Interactive CATV system | Electricity | 322 | Expired |
| US4439784A | Power cutting device for terminal units of CATV system | Electricity | 267 | Expired |
| US5742129A | Organic electroluminescent display panel with projecting ramparts and method for manufacturing the same | Electricity | 266 | Expired |
| US5512919A | Three-dimensional coordinates input apparatus | Physics | 244 | Expired |
| US5323234A | Programmable CATV system and terminal unit therefor | Electricity | 229 | Expired |
| US6215952A | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Electricity | 227 | Expired |
| US4926485A | Output level control apparatus | Electricity | 218 | Expired |
| US5701055A | Organic electoluminescent display panel and method for manufacturing the same | Electricity | 215 | Expired |
| US5608698A | Disk player which avoids sound failure resulted from retry of data reading | Physics | 212 | Expired |
| US5210540A | Global positioning system | Physics | 208 | Expired |
| US5267042A | Image pickup device for automatically recording the location where an image is recorded | Electricity | 208 | Expired |
| US5467326A | Apparatus for selectively playing a recording medium | Physics | 208 | Expired |
| US5218710A | Audio signal processing system having independent and distinct data buses for concurrently transferring audio signal data to provide acoustic control | Physics | 195 | Expired |
| US4504704A | Loudspeaker system | Electricity | 182 | Expired |
| US4890233A | Vehicle bearing detection and data processing methods applicable to vehicle navigation system | Physics | 180 | Expired |
| US5267323A | Voice-operated remote control system | Physics | 178 | Expired |
| US6137954A | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Electricity | 175 | Expired |
| US5389571A | Method of fabricating a gallium nitride based semiconductor device with an aluminum and nitrogen containing intermediate layer | Emerging Cross-Sectional Technologies | 171 | Expired |
| US4455570A | CATV System | Electricity | 168 | Expired |
| US5608715A | Multi-layered recording disk and recording/reproducing system using the same | Physics | 155 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.