Title:
【発明の名称】交換装置メンテナンスフリー方式及び交換システム
Document Type and Number:
Japanese Patent JP2809992
Kind Code:
B2
Inventors:
Kiyoshi Surai
Atsushi Hasegawa
Atsushi Hasegawa
Application Number:
JP21671994A
Publication Date:
October 15, 1998
Filing Date:
August 19, 1994
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H04M3/42; H04M3/00; H04Q3/545; (IPC1-7): H04M3/42; H04M3/00; H04Q3/545
Domestic Patent References:
| JP5974793A | ||||
| JP5860346A | ||||
| JP59140537A | ||||
| JP55133805A | ||||
| JP57178523A | ||||
| JP59183595A | ||||
| JP6096991A | ||||
| JP60117893A | ||||
| JP61127296A |
Attorney, Agent or Firm:
Togawa Hideaki