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    • 2. 发明专利
    • TRAVELING OBJECT RADIO EQUIPMENT
    • JPH06276148A
    • 1994-09-30
    • JP6159393
    • 1993-03-22
    • HITACHI LTDHITACHI VIDEO & INF SYST
    • YOSHIDA JUNICHIUEHARA ATSUSHI
    • H04W12/00H04B7/26
    • PURPOSE:To execute locking and unlocking an electronic locking state and to improve operability by judging the coincidence of a demodulated digital code with the code inside the memory of a radio equipment mainbody. CONSTITUTION:In the traveling radio equipment mainbody 1, turning is executed with a frequency which is transmitted from a radio transmitting equipment A2 transmitting the code coinciding the incorporated digital code or the radio transmitting equipment B3 transmitting the code of non-coincidence, receives it by a receiving circuit via an antenna 11, demodulates it by a demodulating circuit 13, executes analysis by a microprocessor 14 and transmits the result to a display equipment 17. Then, when the transmitting equipment A2 is sufficiently approaching the mainbody 1, the mainbody 1 demodulates a signal from the radio equipment A2. It is judged whether or not electronic locking is executed when the demodulated code coincides with the code inside the nonvolatile memory 15 and unlocking is executed at the time of electronic locking. When the transmitting equipment A2 is leaving from the mainbody 1, electronic locking is executed. Moreover, electronic locking is executed when the transmitting equipment B3 is sufficiently approaching the mainbody 1.
    • 3. 发明专利
    • CELLULAR RADIO TELEPHONE SET
    • JPH06244790A
    • 1994-09-02
    • JP2645193
    • 1993-02-16
    • HITACHI LTDHITACHI VIDEO & INF SYST
    • YOSHIDA JUNICHIYAMAMOTO KOICHI
    • H04W76/02H04B7/26H04M1/00H04W4/16H04W84/10
    • PURPOSE:To improve the operability by starting and stopping telephone transfer based on either whether a radio transmitter can receive demodulate a signal to be transmitted or not or whether or not a demodulated digital code coincides with or not. CONSTITUTION:A cellular radio telephone set main body 1 tunes either with the frequency sent by a radio transmitter A2 sending the coincident code with the digital code in the body 1 or the frequency which is sent by a radio transmitter B2 sending an discordant code. The frequency is received 12 through an antenna 10 and demodulated 13, analyzed by a microprocessor 16 and the result is displayed 19. When the demodulated code coincides with the code in a nonvolatile memory 17, a telephone transfer stop code is automatically sent. When the code is either discordant or can not be received or demodulated, the calling is performed by using a telephone transfer start code and a transfer destination telephone number set in advance. Thus, when a transmitter A2 approaches the main body 1, the telephone transfer is stopped and, when it leaves, it can be started. Thus, the input from a key pad 18 can be unnecessitated.
    • 4. 发明专利
    • MOBILE RADIO EQUIPMENT
    • JPH06232800A
    • 1994-08-19
    • JP1841193
    • 1993-02-05
    • HITACHI LTDHITACHI VIDEO & INF SYST
    • YOSHIDA JUNICHI
    • H04B7/26H04Q7/04
    • PURPOSE:To improve the operability and the reliability by utilizing a position registration function of each mobile radio equipment so as to correct a difference in time automatically. CONSTITUTION:When an area ID received from a base station of a mobile system is changed, a microprocessor 4 detects the ID stored in a nonvolatile memory 5 to be different at the time of performing preceding position registration. Then the processor 4 makes position registration with a base station to discriminate whether or not there is a difference in time between a district of the received area ID and a district of the area ID in the memory 5. When any the difference in time is in existence, the processor 4 sends information to correct the difference in time of a built-in clock to a clock circuit 6 for the correction and the result is displayed on a display device 7. Then the content of the memory 5 is revised by the received area ID. Thus, it is not required for the user to correct manually the difference in time at each occasion.
    • 5. 发明专利
    • MOBILE RADIO TELEPHONE SYSTEM AND PORTABLE TELEPHONE SET
    • JP2000224660A
    • 2000-08-11
    • JP2464699
    • 1999-02-02
    • HITACHI LTDHITACHI VIDEO & INF SYST
    • NAKAHARA AKIHARUHATORI MASAYUKIYOSHIDA JUNICHI
    • H04W8/22H04Q7/38
    • PROBLEM TO BE SOLVED: To collect and delete user information in the inside of a mobile set by providing a storage means storing user information and a means that deletes and transfers the user information to a base station, and providing a position registration monitor means for mobile sets, a means that transmits a user information transfer signal to mobile sets and a means that receives and stores the user information from mobile sets to the base station. SOLUTION: A base station 101 registers a subscriber number of a mobile set 106 from which user information is desirably collected in advance. The mobile set 106 conducts position registration 110 without fail when a user changes a position registration area and transmits a position registration request including a subscriber number 112. The base station 101 uses a mobile set monitor means 104 to check a subscriber number of the mobile set making position registration and transmits a user information transfer start signal to the mobile set 106 when confirming the mobile set 106. Upon the receipt of the user information transfer start signal, the mobile set 106 transmits the user information in a user information storage device 109 to the base station 101 and uses a delete means 111 to delete the user information.
    • 7. 发明专利
    • MOBILE RADIO COMMUNICATION EQUIPMENT INCORPORATING BATTERY
    • JPH0621866A
    • 1994-01-28
    • JP17650592
    • 1992-07-03
    • HITACHI LTDHITACHI VIDEO & INF SYST
    • YAMAMOTO KOICHIYOSHIDA JUNICHIYATOMI TAKASHI
    • H04B7/26
    • PURPOSE:To replace the battery without the interruption of communication by providing a power supply changeover switch switching power supply to battery in a mobile radio communication equipment from a removable battery when the battery is removed. CONSTITUTION:When a power supply voltage is discriminated to be a minimum voltage and the communication is desired to be extended, a removable battery 1 is removed from the mobile radio communication equipment incorporating the battery to replace the battery with a spare removable battery. In this case, a power supply changeover switch 4 is used to select the connection so that the power is supplied from the battery 3 built in the mobile radio communication equipment and the mobile radio communication equipment incorporating the battery is driven and the communication is continued. Then the standby removable battery is mounted to the mobile radio communication equipment incorporating the battery and the power supply changeover switch 4 is used to select the connection from the battery 3 incorporated in the mobile radio communication equipment into the standby removable battery to supply the power to the mobile radio communication equipment incorporating the battery and to continue further the communication.
    • 8. 发明专利
    • JPH05347581A
    • 1993-12-27
    • JP15644892
    • 1992-06-16
    • HITACHI LTDHITACHI VIDEO & INF SYST
    • YOSHIDA JUNICHIKIMURA HIDEFUMI
    • H04B7/26
    • PURPOSE:To improve the operability to the reinput of telephone numbers and to easily deal with the system change in regard of a cellular radio telephone set. CONSTITUTION:A microprocessor 2 decides the key input carried out through a key pad 1 and then performs the prescribed processing. A telephone number including an additional 'distance identification number applied in a specific distance' is inputted and a '1' key is pushed in a digit key group 5 after a function key 6. Thus the 'distance identification number applied in a specific distance' is replaced with that stored in a nonvolatile memory 3. Meanwhile the 'distance identification number applied in a specific distance' is used exclusive for decision when a '2' key is pushed after the key 6 and after the input of a telephone number serving as a 'distance identification number'. Furthermore a 'distance identification number applied out of a specific distance' is stored in the memory 3 with push of a '3' key.