Title:
【発明の名称】ディジタルトーン信号発生回路
Document Type and Number:
Japanese Patent JP2923886
Kind Code:
B2
Inventors:
HAYASHI HIROSHI
Application Number:
JP18339597A
Publication Date:
July 26, 1999
Filing Date:
July 09, 1997
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
H04L27/26; H04M1/00; (IPC1-7): H04M1/00; H04L27/26
Domestic Patent References:
| JP231554A | ||||
| JP1117561A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)