P

Inventor

YOSHIZAWA KEN

JP7 patents
⚠️ This page may combine multiple inventors who share the name “YOSHIZAWA KEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI MAXELL

3 patents
US4710913ADec 1, 1987

Optical recording disc

HITACHI MAXELL36 citations90
US5273598ADec 28, 1993

Optical disc manufacturing method

HITACHI MAXELL14 citations70
US4911968AMar 27, 1990

Optical disc

HITACHI MAXELL16 citations70

SHINETSU HANDOTAI KK

2 patents
US5792258AAug 11, 1998

High-frequency induction heater and method of producing semiconductor single crystal using the same

SHINETSU HANDOTAI KK7 citations73
US7361219B2Apr 22, 2008

Method for producing silicon wafer and silicon wafer

SHINETSU HANDOTAI KK6 citations60

KAO CORP

2 patents
US5993948ANov 30, 1999

Magnetic recording medium

KAO CORP15 citations72
US5776590AJul 7, 1998

Magnetic recording medium

KAO CORP4 citations61