Title:
【発明の名称】DTMF信号受信回路
Document Type and Number:
Japanese Patent JP2806397
Kind Code:
B2
Inventors:
Mitsuhiko Noda
Application Number:
JP33484690A
Publication Date:
September 30, 1998
Filing Date:
November 29, 1990
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H04M1/65; H04M11/00; H04Q1/45; (IPC1-7): H04M11/00; H04M1/65; H04Q1/45
Domestic Patent References:
| JP294743A | ||||
| JP63169746U |
Attorney, Agent or Firm:
Kenji Yoshida (2 outside)