Title:
【発明の名称】高周波可聴雑音検出器
Document Type and Number:
Japanese Patent JP2573512
Kind Code:
B2
Inventors:
TAKAGI KUSUO
Application Number:
JP8644888A
Publication Date:
January 22, 1997
Filing Date:
April 08, 1988
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
H04M1/24; G01R29/08; H04B17/00; (IPC1-7): H04M1/24; H04B17/00
Attorney, Agent or Firm:
Masaki Yamakawa (1 person outside)