ALPS ELECTRIC CO., LTD.
4,113Patents
653Active
4,113Granted
49Portfolio score
Filing activity: Mar 16, 1973 → Jun 1, 2018 · 336 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6555770B2 | Composite operation switch | Electricity | 1,327 | Expired |
| US6589118B1 | Analog input device to input multi directional signals | Electricity | 1,086 | Expired |
| US6538558B2 | Communication system | Electricity | 303 | Expired |
| US5790106A | Coordinate input apparatus with pen and finger input detection | Physics | 250 | Expired |
| US6153062A | Magnetoresistive sensor and head | Physics | 215 | Expired |
| US6075520A | Small current detector circuit and locator device using the same | Physics | 212 | Expired |
| US5627565A | Space coordinates detecting device and input apparatus using same | Physics | 205 | Expired |
| US5785317A | Operation apparatus for a game machine | Human Necessities | 202 | Expired |
| US5583742A | Computer with protective cover having outwardly projecting cushioning portions | Emerging Cross-Sectional Technologies | 185 | Expired |
| US6952183B2 | Circularly-polarized-wave patch antenna which can be used in a wide frequency band | Electricity | 176 | Expired |
| US5611028A | Image processing method and system for coloring an image with groups of colors which produce a desired impression | Physics | 172 | Expired |
| US5693920A | Two-stage movement seesaw switch apparatus | Electricity | 169 | Expired |
| US6792889B2 | Plasma processing apparatus and method capable of performing uniform plasma treatment by control of excitation power | Electricity | 165 | Expired |
| US6800825B1 | Switch device | Electricity | 159 | Expired |
| US6359616B1 | Coordinate input apparatus | Physics | 155 | Expired |
| US6924732B2 | Camera for monitoring utilizing power line communication | Electricity | 148 | Expired |
| US4382167A | Push-button switch | Electricity | 138 | Expired |
| US4825209A | Remote control apparatus | Electricity | 135 | Expired |
| US4727302A | Rear view mirror position control device of automobile | Physics | 133 | Expired |
| US6448874B1 | Resonant line constructed by microstrip line which is easy to be trimmed | Electricity | 129 | Expired |
| US4990900A | Touch panel | Physics | 128 | Expired |
| US4806751A | Code wheel for a reflective type optical rotary encoder | Physics | 125 | Expired |
| US4607147A | Membrane switch | Electricity | 124 | Expired |
| US5991467A | Image reading apparatus containing light receiving transistors and switching transistors | Physics | 120 | Expired |
| US6704005B2 | Input device which allows button input operation and coordinate input operation to be performed in the same operation plane | Electricity | 118 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.