Toshihiro Shigemori

Person

Kanagawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for obtaining spectral characteristics
- Patent number 8,908,176
- Issue date Dec 9, 2014
- Ricoh Company, Ltd.
- Yoichi Kubota
- G01 - MEASURING TESTING
Information Patent Grant
Fine clock resolution digital phase locked loop apparatus
- Patent number 7,652,540
- Issue date Jan 26, 2010
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Digital PLL circuit and optical disk apparatus having digital PLL c...
- Patent number 7,630,286
- Issue date Dec 8, 2009
- Ricoh Company, Ltd.
- Isamu Moriwaki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Fine clock resolution digital phase locked loop apparatus
- Patent number 7,298,216
- Issue date Nov 20, 2007
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Demodulation circuit for demodulating wobbling signal
- Patent number RE39513
- Issue date Mar 13, 2007
- Ricoh Company, Ltd.
- Hiroshi Maegawa
- 369 - Dynamic information storage or retrieval
Information Patent Grant
Recording clock generating apparatus for a data recording system
- Patent number 7,075,868
- Issue date Jul 11, 2006
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Data recording clock signal generator for generating a recording cl...
- Patent number 6,980,499
- Issue date Dec 27, 2005
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Wobble signal detection circuit and optical disk device
- Patent number 6,859,425
- Issue date Feb 22, 2005
- Ricoh Company, Ltd.
- Hiroshi Maegawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording clock generating apparatus for a data recording system
- Patent number 6,693,862
- Issue date Feb 17, 2004
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk drive
- Patent number 6,400,673
- Issue date Jun 4, 2002
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Demodulation circuit for demodulating wobbling signal
- Patent number 6,345,018
- Issue date Feb 5, 2002
- Ricoh Company, Ltd.
- Hiroshi Maegawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording timing control circuit for optical disk driving device
- Patent number 6,125,089
- Issue date Sep 26, 2000
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk drive having a time code detection device for reliably...
- Patent number 6,061,313
- Issue date May 9, 2000
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Reference clock frequency divider
- Patent number 5,438,601
- Issue date Aug 1, 1995
- Ricoh Company Ltd.
- Hiroshi Maegawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Servo signal generator for optical disk driving apparatus
- Patent number 5,272,686
- Issue date Dec 21, 1993
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk driving apparatus
- Patent number 5,241,521
- Issue date Aug 31, 1993
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc apparatus
- Patent number 5,235,576
- Issue date Aug 10, 1993
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Tracking servo method used in an optical disk drive unit
- Patent number 5,222,057
- Issue date Jun 22, 1993
- Ricoh Company, Ltd.
- Haruyuki Suzuki
- G11 - INFORMATION STORAGE
Information Patent Grant
Data modulating system
- Patent number 5,073,776
- Issue date Dec 17, 1991
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Optical disk apparatus with data transfer rate and rotational speed...
- Patent number 5,063,552
- Issue date Nov 5, 1991
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device keeping coincident the optical axes of the ob...
- Patent number 5,060,214
- Issue date Oct 22, 1991
- Ricoh Company, Ltd.
- Masahiko Nakayama
- G11 - INFORMATION STORAGE
Information Patent Grant
PLL circuit with band width varying in accordance with the frequenc...
- Patent number 4,942,370
- Issue date Jul 17, 1990
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Tracking control device of an optical pick-up
- Patent number 4,835,754
- Issue date May 30, 1989
- Ricoh Company, Ltd.
- Kazutaka Yamamoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Digital phase-locked loop filter
- Patent number 4,816,722
- Issue date Mar 28, 1989
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Tracking control system of an optical pick-up
- Patent number 4,817,069
- Issue date Mar 28, 1989
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Grant
Motor speed control
- Patent number 4,814,679
- Issue date Mar 21, 1989
- Ricoh Company, Ltd.
- Toshihiro Shigemori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
APPARATUS AND METHOD FOR OBTAINING SPECTRAL CHARACTERISTICS
- Publication number 20130182256
- Publication date Jul 18, 2013
- RICOH COMPANY, LTD.
- Yoichi KUBOTA
- G01 - MEASURING TESTING
Information Patent Application
Digital PLL circuit and optical disk apparatus having digital PLL c...
- Publication number 20070172014
- Publication date Jul 26, 2007
- Isamu Moriwaki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Recording clock generating apparatus for a data recording system
- Publication number 20060203641
- Publication date Sep 14, 2006
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Application
Recording clock generating apparatus for a data recording system
- Publication number 20040136287
- Publication date Jul 15, 2004
- Toshihiro Shigemori
- G11 - INFORMATION STORAGE
Information Patent Application
Wobble signal detection circuit and optical disk device
- Publication number 20030128641
- Publication date Jul 10, 2003
- Hiroshi Maegawa
- G11 - INFORMATION STORAGE

Toshihiro Shigemori

Person

Patents Grantslast 30 patents

Apparatus and method for obtaining spectral characteristics

Fine clock resolution digital phase locked loop apparatus

Digital PLL circuit and optical disk apparatus having digital PLL c...

Fine clock resolution digital phase locked loop apparatus

Demodulation circuit for demodulating wobbling signal

Recording clock generating apparatus for a data recording system

Data recording clock signal generator for generating a recording cl...

Wobble signal detection circuit and optical disk device

Recording clock generating apparatus for a data recording system

Optical disk drive

Demodulation circuit for demodulating wobbling signal

Recording timing control circuit for optical disk driving device

Optical disk drive having a time code detection device for reliably...

Reference clock frequency divider

Servo signal generator for optical disk driving apparatus

Optical disk driving apparatus

Optical disc apparatus

Tracking servo method used in an optical disk drive unit

Data modulating system

Optical disk apparatus with data transfer rate and rotational speed...

Optical pickup device keeping coincident the optical axes of the ob...

PLL circuit with band width varying in accordance with the frequenc...

Tracking control device of an optical pick-up

Digital phase-locked loop filter

Tracking control system of an optical pick-up

Motor speed control

Patents Applicationslast 30 patents

APPARATUS AND METHOD FOR OBTAINING SPECTRAL CHARACTERISTICS

Digital PLL circuit and optical disk apparatus having digital PLL c...

Recording clock generating apparatus for a data recording system

Recording clock generating apparatus for a data recording system

Wobble signal detection circuit and optical disk device