Takashi Katagi
25Patents
13h-index
56Co-inventors
84Inventor score
Filing activity: Sep 15, 1976 → Aug 27, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5784034A | Antenna apparatus | Electricity | 135 | Expired |
| US5262791A | Multi-layer array antenna | Electricity | 58 | Expired |
| US4994813A | Antenna system | Electricity | 50 | Expired |
| US4827270A | Antenna device | Electricity | 42 | Expired |
| US6529170B1 | Two-frequency antenna, multiple-frequency antenna, two- or multiple-frequency antenna array | Electricity | 38 | Expired |
| US5434579A | Inverted F antenna with non-contact feeding | Electricity | 29 | Expired |
| US5684492A | Antenna device having a band pass filter | Electricity | 25 | Expired |
| US4922257A | Conformal array antenna | Electricity | 23 | Expired |
| US5430451A | Array antenna mounted on spacecrafts | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5592185A | Antenna apparatus and antenna system | Electricity | 19 | Expired |
| US5257030A | Antenna system | Electricity | 18 | Expired |
| US5717410A | Omnidirectional slot antenna | Electricity | 17 | Expired |
| US6043776A | Mobile satellite communication system | Electricity | 15 | Expired |
| US4052724A | Branching filter | Electricity | 12 | Expired |
| US5181040A | Method of measuring the null angle of a monopulse antenna and apparatus therefor | Physics | 12 | Expired |
| US4618866A | Dual reflector antenna system | Electricity | 12 | Expired |
| US4462034A | Antenna system with plural horn feeds | Electricity | 10 | Expired |
| US4500882A | Antenna system | Electricity | 10 | Expired |
| US4559540A | Antenna system with plural horn feeds | Electricity | 8 | Expired |
| US4644359A | Antenna system | Electricity | 7 | Expired |
| US5374934A | Antenna mirror-surface measuring system | Physics | 6 | Expired |
| US6426730B1 | Multi-frequency array antenna | Electricity | 4 | Expired |
| US4356494A | Dual reflector antenna | Electricity | 3 | Expired |
| US4506270A | Reflecting mirror antenna unit with diverse curvature | Electricity | 2 | Expired |
| US5075692A | Antenna system | Electricity | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.