Ken Takei
74Patents
18h-index
45Co-inventors
84Inventor score
Filing activity: Feb 12, 1992 → Aug 2, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8811278B2 | Low/high frequency shared leakage antenna, base station apparatus and close-range detection system using the antenna | Electricity | 223 | Active |
| US6466774B1 | Wireless handset | Electricity | 111 | Expired |
| US5914693A | Coaxial resonant slot antenna, a method of manufacturing thereof, and a radio terminal | Electricity | 87 | Expired |
| US6384680B1 | RF amplifier with plural combiners | Electricity | 80 | Expired |
| US6198441A | Wireless handset | Electricity | 75 | Expired |
| US6028561A | Tunable slot antenna | Electricity | 75 | Expired |
| US6750707B2 | Multi-carrier RF amplifiers | Electricity | 70 | Expired |
| US5977924A | TEM slot array antenna | Electricity | 48 | Expired |
| US5559524A | Antenna system including a plurality of meander conductors for a portable radio apparatus | Electricity | 38 | Expired |
| US6188369A | Tunable slot antenna with capacitively coupled slot island conductor for precise impedance adjustment | Electricity | 34 | Expired |
| US5854971A | Output-controlled power amplifier, radio communication terminal and radio communication base station | Electricity | 34 | Expired |
| US6034644A | Tunable slot antenna with capacitively coupled slot island conductor for precise impedance adjustment | Electricity | 29 | Expired |
| US5585807A | Small antenna for portable radio phone | Electricity | 26 | Expired |
| US6653977B1 | Wireless handset | Electricity | 25 | Expired |
| US5298910A | Antenna for radio apparatus | Electricity | 24 | Expired |
| US6879845B2 | Wireless communication method and system using beam direction-variable antenna | Electricity | 23 | Expired |
| US6031494A | Handy-phone with shielded high and low frequency circuits and planar antenna | Electricity | 22 | Expired |
| US6233434A | System for transmitting/receiving a signal having a carrier frequency band for a radio base station | Electricity | 19 | Expired |
| US7157050B2 | System and method for detecting biological and chemical material | Physics | 15 | Expired |
| US6952565B1 | Communication terminal, automobile communication terminal, and automobile | Electricity | 15 | Expired |
| US8380124B2 | Communication system by electrostatic coupling and electromagnetic induction | Electricity | 14 | Active |
| US6452554B1 | Antenna element and radio communication apparatus | Electricity | 12 | Expired |
| US6236272A | Traveling wave power combiner and radio base station | Electricity | 11 | Expired |
| US6396349B2 | Traveling wave power combiner and radio base station | Electricity | 11 | Expired |
| US6462714B1 | Wireless handset using a slot antenna | Electricity | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.