Kenichi Yoneyama

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical amplifier repeater
- Patent number 6,603,587
- Issue date Aug 5, 2003
- NEC Corporation
- Ryu Yokoyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multi-stage optical amplifier apparatus having fiber grating with a...
- Patent number 6,600,595
- Issue date Jul 29, 2003
- NEC Corporation
- Ryuji Aida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier, and method and apparatus for monitoring an optic...
- Patent number 6,337,936
- Issue date Jan 8, 2002
- NEC Corporation
- Kenichi Yoneyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Supervisory signal optical bypass circuit, optical amplifying repea...
- Patent number 6,301,404
- Issue date Oct 9, 2001
- NEC Corporation
- Kenichi Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Light timing pulses generating method and light timing circuit
- Patent number 6,226,090
- Issue date May 1, 2001
- NEC Corporation
- Kenichi Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical surge preventing method and system for use with or in a rar...
- Patent number 6,064,514
- Issue date May 16, 2000
- NEC Corporation
- Yasuhiro Aoki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Apparatus for measuring optical transmission line property and opti...
- Patent number 5,923,453
- Issue date Jul 13, 1999
- NEC Corrporation
- Kenichi Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical PLL circuit and method of controlling the same
- Patent number 5,894,247
- Issue date Apr 13, 1999
- NEC Corporation
- Masanori Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength division multiplexing transmission system comprising a f...
- Patent number 5,801,860
- Issue date Sep 1, 1998
- NEC Corporation
- Kenichi Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical fiber amplifier for superimposing a sub-signal
- Patent number 5,801,877
- Issue date Sep 1, 1998
- NEC Corporation
- Kenichi Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical regenerative circuit
- Patent number 5,764,396
- Issue date Jun 9, 1998
- NEC Corporation
- Kenichi Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Monitoring system for all optical regenerators
- Patent number 5,657,154
- Issue date Aug 12, 1997
- NEC Corporation
- Kenichi Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical repeater
- Patent number 5,535,037
- Issue date Jul 9, 1996
- NEC Corporation
- Kenichi Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical fiber amplifier circuit comprising a control circuit for co...
- Patent number 5,299,055
- Issue date Mar 29, 1994
- NEC Corporation
- Kenichi Yoneyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical amplifying apparatus
- Patent number 5,295,015
- Issue date Mar 15, 1994
- NEC Corporation
- Kenichi Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Optical amplifier apparatus
- Publication number 20010013970
- Publication date Aug 16, 2001
- Ryuji Aida
- H01 - BASIC ELECTRIC ELEMENTS

Kenichi Yoneyama

Person

Patents Grantslast 30 patents

Optical amplifier repeater

Multi-stage optical amplifier apparatus having fiber grating with a...

Optical amplifier, and method and apparatus for monitoring an optic...

Supervisory signal optical bypass circuit, optical amplifying repea...

Light timing pulses generating method and light timing circuit

Optical surge preventing method and system for use with or in a rar...

Apparatus for measuring optical transmission line property and opti...

Optical PLL circuit and method of controlling the same

Wavelength division multiplexing transmission system comprising a f...

Optical fiber amplifier for superimposing a sub-signal

Optical regenerative circuit

Monitoring system for all optical regenerators

Optical repeater

Optical fiber amplifier circuit comprising a control circuit for co...

Optical amplifying apparatus

Patents Applicationslast 30 patents

Optical amplifier apparatus