P

Inventor

AZUMA KAZUMASA

JP8 patents
⚠️ This page may combine multiple inventors who share the name “AZUMA KAZUMASA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI TELECOMM TECH

5 patents
US6031824AFeb 29, 2000

Maintenance and supervisory control method and system for multiplex communication equipment

HITACHI TELECOMM TECH4 citations60
US5999516ADec 7, 1999

Multiplex communication equipment and communication test method thereof

HITACHI TELECOMM TECH4 citations60
US5953313ASep 14, 1999

Circuit switching control method for multiplex communication equipment

HITACHI TELECOMM TECH3 citations60
US6862290B1Mar 1, 2005

Line switching system and line switching unit of dynamic band variation unit

HITACHI TELECOMM TECH0 citations39
US6215794B1Apr 10, 2001

Multiple band change-over method for multiplex communication equipment

HITACHI TELECOMM TECH0 citations39

HITACHI LTD

2 patents
US7764666B2Jul 27, 2010

VoIP gateway apparatus, and method for controlling call-in/call-out in VoIP gateway apparatus

HITACHI LTD3 citations61
US7856009B2Dec 21, 2010

VoIP gateway apparatus

HITACHI LTD1 citations48

HITACHI TELECOM TECHNOLOGIES

1 patent
US6912220B2Jun 28, 2005

ATM equipment

HITACHI TELECOM TECHNOLOGIES3 citations47