Tohoku Pioneer Corporation
325Patents
198Active
325Granted
52Portfolio score
Filing activity: Feb 28, 1997 → Jan 8, 2024 · 95 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7193589B2 | Drive methods and drive devices for active type light emitting display panel | Physics | 175 | Expired |
| US6633280B1 | Touch panel device | Physics | 115 | Expired |
| US6351076B1 | Luminescent display panel drive unit and drive method thereof | Physics | 63 | Expired |
| US5929561A | Organic electroluminescence element and method of making thereof | Electricity | 48 | Expired |
| US6774878B2 | Drive unit for a luminescence display panel | Physics | 35 | Expired |
| US9528695B2 | Mirror unit and light source for illumination | Electricity | 31 | Active |
| US7433479B2 | Headphone apparatus | Electricity | 26 | Expired |
| US7912242B2 | Speaker apparatus and terminal member | Electricity | 25 | Active |
| US8139813B2 | Speaker device | Electricity | 23 | Active |
| US6735322B1 | Speaker | Electricity | 20 | Expired |
| US6892850B2 | Surround for speaker system and manufacturing method thereof | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6957714B2 | Speaker and speaker diaphragm | Electricity | 20 | Expired |
| US6841948B2 | Device for driving luminescent display panel | Physics | 19 | Expired |
| US6617801B2 | Drive device for a light-emitting panel, and a portable terminal device including a light-emitting panel | Physics | 16 | Expired |
| US6510112B1 | Drive apparatus for optical recording medium | Physics | 16 | Expired |
| US6788277B2 | Drive unit and drive method of light-emitting display panel | Physics | 16 | Expired |
| US7211938B2 | Double-sided display device and method of fabricating the same | Electricity | 15 | Expired |
| US6672423B2 | Speaker and method of assembling the speaker | Electricity | 15 | Expired |
| US6785396B2 | Earphone | Electricity | 14 | Expired |
| US7130440B2 | Chair equipped with a speaker | Electricity | 14 | Expired |
| US7187350B2 | Active type light emitting display device | Physics | 13 | Expired |
| US6334504B1 | Molded foam resin, process for forming the same and speaker diaphragm consisting of the same | Electricity | 13 | Expired |
| US6747728B2 | Luminescent display and a method producing the same | Emerging Cross-Sectional Technologies | 12 | Expired |
| US7653209B2 | Speaker apparatus | Electricity | 12 | Active |
| US7019454B2 | Light emitting device | Emerging Cross-Sectional Technologies | 12 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.