P

Inventor

ISHIKAWA YOSHINORI

JP54 patents
⚠️ This page may combine multiple inventors who share the name “ISHIKAWA YOSHINORI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

14 patents
US6865141B2Mar 8, 2005

Optical disc apparatus switching focus point between layers

HITACHI LTD33 citations96
US7111133B2Sep 19, 2006

Control apparatus for selectively operating with program data from two memories and having a system controller supplying program data and address for writing the data to the second memory

HITACHI LTD7 citations72
US7848190B2Dec 7, 2010

Optical disc apparatus switching focus point between layers

HITACHI LTD2 citations63
US7710838B2May 4, 2010

Focus out detecting apparatus and optical disc apparatus using the same

HITACHI LTD2 citations63
US7542387B2Jun 2, 2009

Defocus detection device, defocus detection method and optical disk unit using the same

HITACHI LTD4 citations63
US7471597B2Dec 30, 2008

Optical disc apparatus switching focus point between layers

HITACHI LTD2 citations63
US7200075B2Apr 3, 2007

Optical disc apparatus switching focus point between layers

HITACHI LTD2 citations63
US7983122B2Jul 19, 2011

Defocus detection device, defocus detection method and optical disk unit using the same

HITACHI LTD0 citations52
US7663986B2Feb 16, 2010

Servo control signal generation device and an optical disk device using the same

HITACHI LTD0 citations52
US7310290B2Dec 18, 2007

Tracking learning/adjusting method and optical disk device

HITACHI LTD1 citations52
US7212472B2May 1, 2007

Focus point switching

HITACHI LTD0 citations52
US7151722B2Dec 19, 2006

Optical disc apparatus switching focus point between layers

HITACHI LTD0 citations52
US7457221B2Nov 25, 2008

Optical disc recording/reproduction device

HITACHI LTD1 citations51
US6665237B2Dec 16, 2003

Control apparatus and optical disc apparatus using it

HITACHI LTD0 citations50

YAZAKI CORP

12 patents

TOYOTA MOTOR CO LTD

5 patents

ISHIKAWA YOSHINORI

4 patents

ALPS ELECTRIC CO LTD

2 patents

KAIJO KK

2 patents

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

2 patents

SATO AKIO

1 patent

ONODA SHINYA

1 patent

HITACHI LG DATA STORAGE INC

1 patent

NIKON CORP

1 patent

KIORITZ CORP

1 patent

KAWASAKI MINORU

1 patent

TADA YUKINOBU

1 patent

KATAOKA TAKEYOSHI

1 patent

YOKOWO SEISAKUSHO KK

1 patent

Showing the top 50 of 54 patents by PatentIndex Score.