Inventor · disambiguated record
Yoshihiro Utsumi
Also filed as: UTSUMI YOSHIHIRO
9 granted patents·113 citations·filing 1979–1994
88Inventor score
Top patents by PatentIndex Score
9 records- 0190US4243848AFocus control system for optical read-out apparatusTEAC CORP·Filed 1979·Granted Jan 6, 1981·38 cites·5 claims
- 0284US4506149ATracking servo signal generating device in an apparatus for reading recorded informationPIONEER ELECTRONIC CORP·Filed 1982·Granted Mar 19, 1985·28 cites·2 claims
- 0364US5034934AOpto-magnetic disk unit with improved dynamic range characteristics and opto-magnetic disk thereforPIONEER ELECTRONIC CORP·Filed 1989·Granted Jul 23, 1991·13 cites·6 claims
- 0455US5251199ALaser diode drive control apparatusPIONEER ELECTRONIC CORP·Filed 1992·Granted Oct 5, 1993·10 cites·2 claims
- 0546US5497243AVideo disk recorder having a real-time editing functionPIONEER ELECTRONIC CORP·Filed 1994·Granted Mar 5, 1996·7 cites·2 claims
- 0642US5189651AOptical system in magneto-optical recording and reproducing devicePIONEER ELECTRONIC CORP·Filed 1989·Granted Feb 23, 1993·10 cites·10 claims
- 0734US5051836AOptical disc with pregrooves and recording method and apparatus using an optical disc of that typePIONEER ELECTRONIC CORP·Filed 1989·Granted Sep 24, 1991·2 cites·20 claims
- 0833US4631396AFocus error detection devicePIONEER ELECTRONIC CORP·Filed 1983·Granted Dec 23, 1986·2 cites·3 claims
- 0931US5233439ADisk player with improved sound during different speed video reproductionsPIONEER ELECTRONIC CORP·Filed 1990·Granted Aug 3, 1993·3 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →