Hirokazu Kato
128Patents
20h-index
191Co-inventors
93Inventor score
Filing activity: Feb 25, 1980 → Aug 3, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5808224A | Portable downloader connectable to karaoke player through wireless communication channel | Physics | 271 | Expired |
| US6093370A | Polynucleotide separation method and apparatus therefor | Chemistry; Metallurgy | 98 | Expired |
| US6121531A | Karaoke apparatus selectively providing harmony voice to duet singing voices | Physics | 65 | Expired |
| US5886275A | Transporting method of karaoke data by packets | Physics | 65 | Expired |
| US5703308A | Karaoke apparatus responsive to oral request of entry songs | Physics | 56 | Expired |
| US5804752A | Karaoke apparatus with individual scoring of duet singers | Physics | 55 | Expired |
| US6206409A | Air bag system | Performing Operations; Transporting | 44 | Expired |
| US5631433A | Karaoke monitor excluding unnecessary information from display during play time | Physics | 37 | Expired |
| US7234239B2 | Hair removing device with a lotion applicator | Human Necessities | 36 | Expired |
| US5902950A | Harmony effect imparting apparatus and a karaoke amplifier | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6568083B1 | Dry shaver with a height adjustable cutter head | Performing Operations; Transporting | 34 | Expired |
| US5810603A | Karaoke network system with broadcasting of background pictures | Physics | 33 | Expired |
| US7343278B2 | Tracking a surface in a 3-dimensional scene using natural visual features of the surface | Physics | 31 | Expired |
| US5286802A | Injection compacting composition for preparing sintered body of metal powder and sintered body prepared therefrom | Performing Operations; Transporting | 31 | Expired |
| US5691494A | Centralized system providing karaoke service and extraneous service to terminals | Physics | 29 | Expired |
| US5119710A | Musical tone generator | Physics | 29 | Expired |
| US4373416A | Wave generator for electronic musical instrument | Physics | 29 | Expired |
| US5854619A | Karaoke apparatus displaying image synchronously with orchestra accompaniment | Physics | 25 | Expired |
| US8614144B2 | Method for fabrication of interconnect structure with improved alignment for semiconductor devices | Electricity | 25 | Active |
| US5410097A | Karaoke apparatus with skip and repeat operation of orchestra accompaniment | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6218126A | Polynucleotide separation method and apparatus therefor | Chemistry; Metallurgy | 19 | Expired |
| US5982816A | Digital communication system using packet assembling/disassembling and eight-to-fourteen bit encoding/decoding | Electricity | 19 | Expired |
| US5587546A | Karaoke apparatus having extendible and fixed libraries of song data files | Physics | 18 | Expired |
| US8419995B2 | Imprint method | Performing Operations; Transporting | 18 | Active |
| US4387617A | Assigner for electronic musical instrument | Physics | 17 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.