P

Inventor

WATANABE TOSHIO

JP217 patents
⚠️ This page may combine multiple inventors who share the name “WATANABE TOSHIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SONY CORP

16 patents
US5764613AJun 9, 1998

optical pickup apparatus

SONY CORP117 citations98
US6097688AAug 1, 2000

Recording/reproducing apparatus and recording/reproducing method for optical recording media

SONY CORP55 citations96
US5881034AMar 9, 1999

Apparatus for driving objective lens

SONY CORP90 citations96
US5841513ANov 24, 1998

Apparatus for reproducing sound signals recorded on a motion picture film with digital sound track

SONY CORP68 citations96
US6414931B1Jul 2, 2002

Lens driving device, optical head and optical disc system

SONY CORP26 citations93
US6292453B1Sep 18, 2001

Optical disc recording/reproduction apparatus having a lens group, focus, servo, and jog mode adjustment

SONY CORP37 citations93
US6115347ASep 5, 2000

Optical pick-up device, optical recording/reproducing apparatus and objective lens

SONY CORP28 citations93
US6084603AJul 4, 2000

Optical information medium and method for printing on the surface of the medium

SONY CORP22 citations93
US6058095AMay 2, 2000

Objective lens having a doublet lens with high numerical aperture

SONY CORP21 citations93
US6041031AMar 21, 2000

Optical disc recording/reproduction apparatus and method

SONY CORP24 citations93
US6005834ADec 21, 1999

Optical recording medium recording and reproducing apparatus and optical pickup device

SONY CORP30 citations93
US5920329AJul 6, 1999

Optical information medium and method for printing on the surface of the medium

SONY CORP23 citations93
US5712842AJan 27, 1998

Optical pick-up device

SONY CORP55 citations93
US7550707B2Jun 23, 2009

Biometrics authentication system with authentication based upon multiple layers

SONY CORP43 citations92
US6570827B1May 27, 2003

Optical element for correction of chromatic aberration, optical pick-up device having optical element for correction of chromatic aberration, optical reproducing device having optical pick-up device and optical recording and reproducing device

SONY CORP21 citations92
US6564009B2May 13, 2003

Apparatus for recording and/or reproducing data onto and/or from an optical disk and method thereof

SONY CORP52 citations92

SEMICONDUCTOR ENERGY LAB

5 patents

NEC CORP

4 patents

MITA INDUSTRIAL CO LTD

3 patents

NIPPON TELEGRAPH & TELEPHONE

2 patents

CANON KK

2 patents

FUJI XEROX CO LTD

2 patents

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

2 patents

WADA PURE CHEMICAL IND

1 patent

NORITZ CORP

1 patent

SYSMEX CORP

1 patent

KAWABATA YUSAKU

1 patent

KAWASAKI STEEL CO

1 patent

WACO PURE CHEMICAL INC

1 patent

ROHM CO LTD

1 patent

HITACHI LTD

1 patent

SEIKO INSTR INC

1 patent

TORAY SILICONE CO

1 patent

RANK XEROX LTD

1 patent

FUJITA TOSHIYUKI

1 patent

SHARP KK

1 patent

TDK CORP

1 patent

Showing the top 50 of 217 patents by PatentIndex Score.