Kokusai Denshin Denwa Co., Ltd.
558Patents
0Active
558Granted
45Portfolio score
Filing activity: Aug 21, 1973 → Jan 19, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5761309A | Authentication system | Electricity | 219 | Expired |
| US5125030A | Speech signal coding/decoding system based on the type of speech signal | Physics | 184 | Expired |
| US4896359A | Speech synthesis system by rule using phonemes as systhesis units | Physics | 178 | Expired |
| US4217609A | Adaptive predictive coding system for television signals | Electricity | 173 | Expired |
| US5610729A | Noise reduction apparatus for reducing noise in decoding of moving picture sequence | Electricity | 173 | Expired |
| US5117287A | Hybrid coding system for moving image | Electricity | 157 | Expired |
| US4920426A | Image coding system coding digital image signals by forming a histogram of a coefficient signal sequence to estimate an amount of information | Electricity | 129 | Expired |
| US5173711A | Microstrip antenna for two-frequency separate-feeding type for circularly polarized waves | Electricity | 124 | Expired |
| US4783779A | Frequency assignment system in FDMA communication system | Electricity | 123 | Expired |
| US5640678A | Macrocell-microcell communication system with minimal mobile channel hand-off | Electricity | 121 | Expired |
| US6092113A | Method for constructing a VPN having an assured bandwidth | Electricity | 115 | Expired |
| US5434693A | Optical short pulse generating device | Physics | 113 | Expired |
| US4652935A | Graded facsimile image signal coding system | Electricity | 109 | Expired |
| US4599691A | Tree transformation system in machine translation system | Physics | 108 | Expired |
| US5412435A | Interlaced video signal motion compensation prediction system | Electricity | 107 | Expired |
| US5613193A | Compensation of frequency offset | Electricity | 100 | Expired |
| US5218359A | Adaptive array antenna system | Physics | 100 | Expired |
| US5786918A | Optical communication system and optical transmitting device | Electricity | 99 | Expired |
| US5347535A | CDMA communication system | Electricity | 98 | Expired |
| US4827339A | Moving picture signal transmission system | Electricity | 97 | Expired |
| US5062106A | ATM exchange system | Electricity | 94 | Expired |
| US5548806A | Mobile communication system having a cell structure constituted by integrating macro cells and micro cells | Electricity | 91 | Expired |
| US4805977A | Optical coupler for optical direct amplifier | Electricity | 91 | Expired |
| US5128625A | Adaptive phase lock loop system | Electricity | 91 | Expired |
| US4837618A | Moving image signal coding system | Electricity | 86 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.