Yasuhiro Hirao
19Patents
6h-index
26Co-inventors
62Inventor score
Filing activity: May 25, 1994 → Mar 4, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5844453A | Surface acoustic wave filter utilizing a transducer having interdigital electrodes and continuously adjacent electrodes | Electricity | 20 | Expired |
| US5534829A | Antenna duplexer | Electricity | 15 | Expired |
| US5760522A | Surface acoustic wave device | Electricity | 14 | Expired |
| US5543757A | Surface acoustic wave filter including alternate open and shorted reflector grating | Electricity | 12 | Expired |
| US6165053A | Method and apparatus for processing in cold air blast | Performing Operations; Transporting | 11 | Expired |
| US6037699A | Surface acoustic wave device | Electricity | 8 | Expired |
| US7322204B2 | Low temperature zoning formation system for holding freshness of food | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5877662A | Surface acoustic wave filter including series and parallel interdigital transducers | Electricity | 5 | Expired |
| US5808523A | High frequency filter including both dielectric and surface acoustic wave resonators | Electricity | 3 | Expired |
| US5719536A | Surface acoustic wave filter with optimized parallel and series resonator capacitances | Electricity | 3 | Expired |
| US6034577A | Integrated interdigital electrode saw filter with specified distances between input/output electrodes | Electricity | 2 | Expired |
| US5719537A | Surface acoustic wave filter with range of a frequency difference between resonance frequencies of series and parallel resonators | Electricity | 2 | Expired |
| US6191668A | Coaxial resonator and dielectric filter using the same | Electricity | 2 | Expired |
| US5663697A | Surface accoustic wave filter | Electricity | 1 | Expired |
| US5675207A | Surface acoustic waver convolver | Electricity | 1 | Expired |
| US6334332B1 | Low temperature waste crushing system taking advantage of cold shortness | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6532761B2 | Low temperature physical distribution system and method and apparatus for maintaining quality in auction market | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6792768B2 | Low temperature physical distribution system and method and apparatus for maintaining quality in auction market | Emerging Cross-Sectional Technologies | 0 | Expired |
| US7051546B2 | Defrosting system using compressed air | Mechanical Engineering; Lighting; Heating | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.