Title:
【発明の名称】内線電話装置
Document Type and Number:
Japanese Patent JP2819565
Kind Code:
B2
Inventors:
Akira Inoue
Application Number:
JP21935688A
Publication Date:
October 30, 1998
Filing Date:
August 31, 1988
Export Citation:
Assignee:
NEC
International Classes:
H04M3/54; H04Q3/58; (IPC1-7): H04M3/54; H04Q3/58
Domestic Patent References:
| JPH01120161A | ||||
| JPS54149410A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)