Yagi Antenna Inc.
24Patents
3Active
24Granted
36Portfolio score
Filing activity: Dec 27, 1974 → Dec 14, 2009 · 3 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4987424A | Film antenna apparatus | Electricity | 70 | Expired |
| US5150365A | Communication system for coexistent base band and broad band signals | Electricity | 55 | Expired |
| US5181042A | Microstrip array antenna | Electricity | 44 | Expired |
| US4626789A | Demodulating circuit for data signal | Electricity | 28 | Expired |
| US5703530A | Radio frequency amplifier having improved CTB and cross modulation characteristics | Electricity | 26 | Expired |
| US5416492A | Electromagnetic radiator using a leaky NRD waveguide | Electricity | 25 | Expired |
| US4516221A | Data communication system | Electricity | 16 | Expired |
| USD551217S1 | Antenna for digital terrestrial broadcasting receiving | General | 14 | Expired |
| US8193989B2 | Antenna apparatus | Electricity | 13 | Active |
| US6195034A | Radio wave absorbing panel | Electricity | 13 | Expired |
| US6864850B2 | Multibeam antenna | Electricity | 12 | Expired |
| US6121939A | Multibeam antenna | Electricity | 10 | Expired |
| US6144706A | Distortion compensation circuit | Electricity | 10 | Expired |
| US4602252A | Method and device for data communication | Electricity | 9 | Expired |
| US6052099A | Multibeam antenna | Electricity | 9 | Expired |
| US4617565A | Method and device for data communication | Electricity | 8 | Expired |
| USD295517S | Television receiving antenna | General | 7 | Expired |
| US6388633B1 | Multibeam antenna | Electricity | 6 | Expired |
| US4334214A | Warning apparatus using microwaves | Physics | 4 | Expired |
| US3974399A | Active high Q filter using transistor | Electricity | 4 | Expired |
| USD308972S | Television receiving antenna | General | 3 | Expired |
| US4547751A | System for frequency modulation | Electricity | 3 | Expired |
| US8094084B2 | Omnidirectional antenna for indoor and outdoor use | Electricity | 1 | Active |
| US8018391B2 | Plate-shaped antenna having at least three planes | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.