Title:
【発明の名称】電話システム
Document Type and Number:
Japanese Patent JP2931652
Kind Code:
B2
Inventors:
KANSAWA SHINICHI
Application Number:
JP22539290A
Publication Date:
August 09, 1999
Filing Date:
August 29, 1990
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
H04M3/42; H04Q3/58; H04M11/02; (IPC1-7): H04M3/42
Domestic Patent References:
| JP63209260A | ||||
| JP63232559A | ||||
| JP59161164A | ||||
| JP4944522B2 |
Attorney, Agent or Firm:
Takashi Honda