Title:
【発明の名称】DTMF信号判定回路
Document Type and Number:
Japanese Patent JP2856968
Kind Code:
B2
Inventors:
MURATA YASUKI
IKEUCHI MICHIO
YOSHIKAWA SHUICHI
IKEUCHI MICHIO
YOSHIKAWA SHUICHI
Application Number:
JP34731291A
Publication Date:
February 10, 1999
Filing Date:
December 27, 1991
Export Citation:
Assignee:
SHAAPU KK
International Classes:
H04L27/26; H04Q1/45; (IPC1-7): H04Q1/45
Domestic Patent References:
| JP6471261A | ||||
| JP62144493A | ||||
| JP63232741A | ||||
| JP445635A |
Attorney, Agent or Firm:
Shusaku Yamamoto