Hiroaki Kosugi
57Patents
21h-index
75Co-inventors
91Inventor score
Filing activity: Sep 17, 1985 → Dec 2, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5369789A | Burst signal transmitter | Electricity | 132 | Expired |
| US5926466A | Time division multiple access FDD wireless unit and time division multiple access FDD/TDD dual mode wireless unit | Electricity | 76 | Expired |
| US6081694A | Mobile telephone transmitter with internal auxiliary matching circuit | Electricity | 52 | Expired |
| US5966666A | Multiple-band mobile transceiver having a smaller number of local oscillators | Electricity | 52 | Expired |
| US5973557A | High efficiency linear power amplifier of plural frequency bands and high efficiency power amplifier | Electricity | 51 | Expired |
| US6175746A | Multiband mobile unit communication apparatus | Electricity | 47 | Expired |
| US5852384A | Dual band oscillator circuit using strip line resonators | Electricity | 43 | Expired |
| US5559474A | Frequency synthesizer with controllable loop filter | Electricity | 41 | Expired |
| US6326845A | Feedforward amplifier | Electricity | 40 | Expired |
| US5594394A | Antenna diversity switching device with switching circuits between the receiver terminal and each antenna | Electricity | 39 | Expired |
| US4700194A | Small antenna | Electricity | 39 | Expired |
| US5852784A | Multiband mobile unit communication apparatus | Electricity | 30 | Expired |
| US5770970A | Transmitter of wireless system and high frequency power amplifier used therein | Electricity | 28 | Expired |
| US6717998B2 | Frequency synthesizer apparatus equipped with fraction part control circuit, communication apparatus, frequency modulator apparatus, and frequency modulating method | Electricity | 28 | Expired |
| US5815036A | Apparatus and method for controlling feedforward amplifier | Electricity | 27 | Expired |
| US6054900A | Power amplifier MMIC and mobile communication terminal | Electricity | 27 | Expired |
| US6201439A | Power splitter/ combiner circuit, high power amplifier and balun circuit | Electricity | 26 | Expired |
| US6114911A | Power amplifier | Electricity | 25 | Expired |
| US5691668A | Feedforward amplifier | Electricity | 23 | Expired |
| US6269253A | Multi-mode wireless communication system | Electricity | 23 | Expired |
| US5694089A | Fast frequency switching synthesizer | Electricity | 21 | Expired |
| US5442812A | Antenna switching apparatus for selectively connecting antenna to transmitter or receiver | Electricity | 20 | Expired |
| US6441692B1 | PLL frequency synthesizer | Electricity | 19 | Expired |
| US5274388A | Antenna device | Electricity | 19 | Expired |
| US6130897A | Time division multiple access FDD/TDD dual mode radio and a time division multiple access TDD dual band system | Electricity | 19 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.