JUNICHI ISHIWATARI

Person

KANAGAWA, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical transmission apparatus monitoring optical performance
- Patent number 7,020,395
- Issue date Mar 28, 2006
- Fujitsu Limited
- Dai Hagimura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Error correcting method and apparatus
- Patent number 6,728,925
- Issue date Apr 27, 2004
- Fujitsu Limited
- Junichi Ishiwatari
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Signal transmitter and signal quality monitoring device
- Patent number 6,642,845
- Issue date Nov 4, 2003
- Fujitsu Limited
- Junichi Ishiwatari
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Error correction method and transmission apparatus
- Patent number 6,487,686
- Issue date Nov 26, 2002
- Fujitsu Limited
- Yukio Yamazaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Alarm detection apparatus
- Patent number 6,252,502
- Issue date Jun 26, 2001
- Fujitsu Limited
- Masaki Kubo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission device and system having the same
- Patent number 6,201,788
- Issue date Mar 13, 2001
- Fujitsu Limited
- Junichi Ishiwatari
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Add-drop multiplexer with enhancement of accessibility to signals i...
- Patent number 5,754,545
- Issue date May 19, 1998
- Fujitsu Limited
- Masahiro Shinbashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission system
- Patent number 5,574,719
- Issue date Nov 12, 1996
- Fujitsu Limited
- Junichi Ishiwatari
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for detecting error in a communications line
- Patent number 5,504,761
- Issue date Apr 2, 1996
- Fujitsu Limited
- Masahiro Shinbashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of changing over path switch in optical transmission device
- Patent number 5,446,725
- Issue date Aug 29, 1995
- Fujitsu Limited
- Junichi Ishiwatari
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Terminal equipment and optical communication system using the same
- Patent number 5,319,488
- Issue date Jun 7, 1994
- Fujitsu Limited
- Junichi Ishiwatari
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Transmission device and upgrade method thereof
- Publication number 20060215681
- Publication date Sep 28, 2006
- FUJITSU LIMITED
- Tsutomu Chikazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission apparatus
- Publication number 20030152384
- Publication date Aug 14, 2003
- FUJITSU LIMITED
- Dai Hagimura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Signal transmitter and signal quality monitoring device
- Publication number 20030086369
- Publication date May 8, 2003
- Junichi Ishiwatari
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ERROR CORRECTING METHOD AND APPARATUS
- Publication number 20030061562
- Publication date Mar 27, 2003
- JUNICHI ISHIWATARI
- H03 - BASIC ELECTRONIC CIRCUITRY

JUNICHI ISHIWATARI

Person

Patents Grantslast 30 patents

Optical transmission apparatus monitoring optical performance

Error correcting method and apparatus

Signal transmitter and signal quality monitoring device

Error correction method and transmission apparatus

Alarm detection apparatus

Transmission device and system having the same

Add-drop multiplexer with enhancement of accessibility to signals i...

Transmission system

Apparatus for detecting error in a communications line

Method of changing over path switch in optical transmission device

Terminal equipment and optical communication system using the same

Patents Applicationslast 30 patents

Transmission device and upgrade method thereof

Optical transmission apparatus

Signal transmitter and signal quality monitoring device

ERROR CORRECTING METHOD AND APPARATUS