Title:
電話システムの主装置およびその動作方法
Document Type and Number:
Japanese Patent JP5694969
Kind Code:
B2
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Inventors:
Toru Nakanishi
Hirotaka Ohata
Hiroshi Qinsenji
Hirotaka Ohata
Hiroshi Qinsenji
Application Number:
JP2012018471A
Publication Date:
April 01, 2015
Filing Date:
January 31, 2012
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04M3/42; H04M3/00; H04Q3/58
Domestic Patent References:
| JP2010273075A | ||||
| JP2003284144A | ||||
| JP2008187224A |
Foreign References:
| US6195560 | ||||
| US6292672 |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Rie Kudo
Rie Kudo