Takayuki Yanagishima
36Patents
22h-index
22Co-inventors
85Inventor score
Filing activity: Mar 19, 1975 → May 12, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4565997A | Warning device for a vehicle | Physics | 204 | Expired |
| US4555694A | Display device for a vehicle | Physics | 156 | Expired |
| US5127708A | Seat with fatigue lessening device | Emerging Cross-Sectional Technologies | 91 | Expired |
| US5129704A | Automatic adjustable seat | Emerging Cross-Sectional Technologies | 83 | Expired |
| US4866776A | Audio speaker system for automotive vehicle | Electricity | 83 | Expired |
| US4514599A | Speaker for automotive vehicle audio system having a vehicle panel serving as sound-amplifying medium | Electricity | 61 | Expired |
| US4564833A | Dozing warning system for a vehicle | Performing Operations; Transporting | 51 | Expired |
| US4594583A | Method and system for detection of driver drowsiness by an abrupt steering change following no steering movement | Performing Operations; Transporting | 46 | Expired |
| US5801667A | Vehicle display which reduces driver's recognition time of alarm display | Electricity | 38 | Expired |
| US4551849A | Vehicle panel speaker for automotive audio system utilizing part of a vehicle panel as a sound-producing medium | Electricity | 34 | Expired |
| US4604611A | System and method for detecting driver drowsiness including detection of steering rotation and reversal | Physics | 33 | Expired |
| US4463347A | Drowsiness alarm system for a vehicle | Performing Operations; Transporting | 33 | Expired |
| US4007357A | Circuit for detecting relative angular displacement of a steering wheel | Performing Operations; Transporting | 31 | Expired |
| US4017843A | Vehicle driver alertness apparatus monitoring steering wheel oscillations | Performing Operations; Transporting | 30 | Expired |
| US4611199A | Alarm system and method for sensing a stand-by state in a driver drowsiness detection system | Physics | 29 | Expired |
| US4348663A | Safety assurance system for road vehicles | Physics | 28 | Expired |
| US4031527A | Electronic alerting system for a vehicle driver | Performing Operations; Transporting | 26 | Expired |
| US3980999A | Arrangement for detecting relative angular movement of a steering wheel | Performing Operations; Transporting | 24 | Expired |
| US4119172A | Steering force control system | Performing Operations; Transporting | 24 | Expired |
| US4496938A | Drowsiness alarm system for a vehicle | Performing Operations; Transporting | 23 | Expired |
| US4550428A | Driver unit for automotive audio speaker | Electricity | 22 | Expired |
| US4005398A | Method of determining the driver's sufficient alertness to drive a motor vehicle safely | Human Necessities | 22 | Expired |
| US4922426A | Control system for vehicle equipment | Performing Operations; Transporting | 21 | Expired |
| US4104621A | Steering-wheel reversal driver alertness monitor | Performing Operations; Transporting | 21 | Expired |
| US4450438A | Drowsiness alarm system for a vehicle | Performing Operations; Transporting | 20 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.