Inventor · disambiguated record
Keiji Maruta
Also filed as: MARUTA KEIJI
8 granted patents·551 citations·filing 1981–1998
90Inventor score
Top patents by PatentIndex Score
8 records- 0193US4914523AOptical disk apparatus compatible with different television system standardsSONY CORP·Filed 1988·Granted Apr 3, 1990·63 cites·16 claims
- 0290US6199810B1Flat-panel display assembly mountable in a vehicleSONY VIDEO TAIWAN CO LTD·Filed 1998·Granted Mar 13, 2001·282 cites·26 claims
- 0389US4449213AOptical reading apparatusSONY CORP·Filed 1981·Granted May 15, 1984·64 cites·6 claims
- 0487US4571026ADriving apparatus for an objective lensSONY CORP·Filed 1983·Granted Feb 18, 1986·57 cites·2 claims
- 0586US5056075AOptical disk player with disk size and pickup location responsive skew servo controlSONY CORP·Filed 1988·Granted Oct 8, 1991·37 cites·6 claims
- 0678US4773057AApparatus for reproducing selectively loaded discs of different diametersSONY CORP·Filed 1987·Granted Sep 20, 1988·26 cites·25 claims
- 0757US4507765AOptical track scannerSUZUKI JUNICHI·Filed 1982·Granted Mar 26, 1985·16 cites·11 claims
- 0845US4751694ACompact optical disk player including non-orthogonal optical pathsSONY CORP·Filed 1987·Granted Jun 14, 1988·6 cites·6 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →