Title:
【発明の名称】機器の使用制限装置
Document Type and Number:
Japanese Patent JP2931276
Kind Code:
B2
Abstract:
A use prohibition system which can disable a cellular phone or any other device if it separates more than a predetermined distance from the user, and at the same time give a warning to the user. It includes an identification signal transmission unit and a use prohibition mode canceling unit attached or mounted to the cellphone. Each unit has a transmitter and a receiver. The receiver of the canceling unit receives an ID code signal from the transmission unit and produces, based on the ID signal received, a use prohibition canceling signal. The canceling unit returns a confirmation signal to the transmission unit. If the two units separate more than a predetermined distance from each other, the levels of the ID signal and the confirmation signal received by the respective units drop below a predetermined value. Thus, the canceling unit stops producing the canceling signal to disable the cellphone, while the transmission unit sounds an alarm.
Inventors:
SASAKURA TOYOKI
MYAMOTO KENICHI
MYAMOTO KENICHI
Application Number:
JP23984297A
Publication Date:
August 09, 1999
Filing Date:
September 04, 1997
Export Citation:
Assignee:
SASAKURA TOYOKI
MYAKEN KEIEI SENRYAKU KENKYUSHO KK
MYAKEN KEIEI SENRYAKU KENKYUSHO KK
International Classes:
H04M1/66; G08B13/14; H04B7/26; H04M1/67; H04M1/673; H04W48/04; H04M1/725; H04W4/00; (IPC1-7): H04M1/66; H04B7/26; H04Q7/38
Domestic Patent References:
| JP595328A | ||||
| JP964967A | ||||
| JP8307936A | ||||
| JP3119294U |
Attorney, Agent or Firm:
Bunji Kamata (2 outside)