Inventor
MARUTA KEIJI
TW8 patents
⚠️ This page may combine multiple inventors who share the name “MARUTA KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
6 patentsUS4449213AMay 15, 1984
Optical reading apparatus
SONY CORP64 citations95
US4914523AApr 3, 1990
Optical disk apparatus compatible with different television system standards
SONY CORP63 citations94
US4571026AFeb 18, 1986
Driving apparatus for an objective lens
SONY CORP57 citations94
US5056075AOct 8, 1991
Optical disk player with disk size and pickup location responsive skew servo control
SONY CORP37 citations90
US4773057ASep 20, 1988
Apparatus for reproducing selectively loaded discs of different diameters
SONY CORP26 citations90
US4751694AJun 14, 1988
Compact optical disk player including non-orthogonal optical paths
SONY CORP6 citations62