Title:
【発明の名称】会議電話サービスの通話方式
Document Type and Number:
Japanese Patent JP2768055
Kind Code:
B2
Inventors:
Suzuki Toshiaki
Application Number:
JP14578391A
Publication Date:
June 25, 1998
Filing Date:
June 18, 1991
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H04M3/56; H04N7/15; (IPC1-7): H04M3/56
Domestic Patent References:
| JP2295269A | ||||
| JP410744A | ||||
| JP449757A | ||||
| JP440146A | ||||
| JP4150652A | ||||
| JP463083A |
Attorney, Agent or Firm:
Ogawa Katsuo