Title:
【発明の名称】料金徴収式電話機の着信回路
Document Type and Number:
Japanese Patent JP2821297
Kind Code:
B2
Inventors:
Naoki Sugai
Application Number:
JP33182791A
Publication Date:
November 05, 1998
Filing Date:
December 16, 1991
Export Citation:
Assignee:
Anritsu Co., Ltd.
International Classes:
H04M1/00; H04M17/00; (IPC1-7): H04M17/00; H04M1/00
Domestic Patent References:
| JP6077155A | ||||
| JP62167440U | ||||
| JP6114563U |
Attorney, Agent or Firm:
Takehiko Suzue