Patents by Inventor Takuji Harada

Takuji Harada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4950091
    Abstract: A rod antenna control system for automobiles wherein electric current is supplied continuously to a motor which pushes up an antenna motor when a current below a predetermined value is flowing to the motor, and the current is supplied intermittently to the motor when a current above a predetermined value flows to the motor, and whether or not the electric current is over or below the predetermined value is determined by integrating the motor current for certain period of time and comparing such integrated value to the predetermined value.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: August 21, 1990
    Assignee: Harada Kogyo Kabushiki Kaisha
    Inventor: Takuji Harada
  • Patent number: 4942311
    Abstract: An automobile antenna control device generating a reset pulse which starts the operation of a microcomputer. The pulse is generated when an automobile radio power source is switched from "off" to "on," or when the power source is switched from "on" to "off," so that a so-called runaway of the microcomputer can be prevented. The power source is connected to an input port of the microcomputer; the antenna is extended when the power source is "on," and is retracted when the power source is "off." The extending or retracting action of the antenna is stopped when the starter power source of the master key switch of the automobile is "on.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: July 17, 1990
    Assignee: Harada Kogyo Kabushiki Kaisha
    Inventor: Takuji Harada
  • Patent number: 4939484
    Abstract: Inductance coupling type transmission channel couplers mounted on either side of an insulator such as window glass of a vehicle including a pair of resonator, each including a cylindrical outer conductor and a helical conductor coaxially provided in the outer conductor with one end connected thereto. The resonant frequency of the tuning inductance circuit thus constructed is set at 1/3 of an objective frequency, and the ratio between the inner diameter and the outer diameter of the helical conductor is set at 1.1-2.0.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: July 3, 1990
    Assignee: Harada Kogyo Kabushiki Kaisha
    Inventor: Takuji Harada
  • Patent number: 4802022
    Abstract: A CATV system for a guest facility such as a hotel including a monitor installed in each room of the facility, an activator for activating the monitor with a signal sent from the front office of the facility, a sensor for detecting a guest who has entered the room and comes close to the monitor, and a display controller for displaying guest information such as a hotel guide on the monitor when the sensor detects the presence of the guest proximity of the monitor.
    Type: Grant
    Filed: March 17, 1987
    Date of Patent: January 31, 1989
    Assignee: Harada Kogyo Kabushiki Kaisha
    Inventor: Takuji Harada
  • Patent number: 4784052
    Abstract: A cooking appliance having a weight measuring device for measuring the weight of a container and the contents thereof, a storing device for memorizing the weight of the container and the content data, a weight variation detector for detecting the weight lost from the container and contents thereof at a specified ratio or by a specified weight from the weight of the container and contents thereof at the start of cooking, and a heating operation stopping device for stopping the heating of the container and contents thereof when the weight thereof is reduced to a specified ratio or by a specified weight from the weight of container and contents thereof at the start of cooking.
    Type: Grant
    Filed: August 28, 1987
    Date of Patent: November 15, 1988
    Assignee: Harada Kogyo Kabushiki Kaisha
    Inventors: Mitsuo Harada, Takuji Harada
  • Patent number: 4621243
    Abstract: A transmission channel coupler for an antenna including two resonators, each resonator being formed with a helical conductor and an outer conductor which is disposed outside of the helical conductor by sharing the same axis with the helical conductor. One end of the helical conductor is electrically connected to the inner wall of the outer conductor, and the other end of the helical conductor is connected to a printed circuit board mounted at the end of the outer conductor so that the helical conductor is positioned inside the outer conductor. The resonators are coaxially mounted on the either side of a glass such as the rear window of a car, window of a building, etc. By means of the structure above, high frequency signals are transmitted through an insulating material, that is, the glass, without damaging it. Also, the coupler can be manufactured small in size and provides excellent frequency characteristics with less transmission loss.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: November 4, 1986
    Assignee: Harada Kogyo Kabushiki Kaisha
    Inventor: Takuji Harada
  • Patent number: 4613833
    Abstract: A transmission channel coupler for an antenna including a first resonator and a second resonator. Each resonator has a helical conductor and an outer conductor which is disposed outside of the helical conductor by sharing the same axis with the helical conductor. One end of the helical conductor is electrically connected to the inner wall of the outer conductor, and the other end of the helical conductor is positioned within the area defined by an end face of the outer conductor. The first and second resonators are coaxially mounted on the either side of a glass such as rear window of a car, window of a building, etc. By means of the structure above, high frequency signals are transmitted through an insulating material, that is, the glass, without damaging it. Also, the coupler can be manufactured small in size and provides excellent frequency characteristics with less transmission loss.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: September 23, 1986
    Assignee: Harada Kogyo Kabushiki Kaisha
    Inventor: Takuji Harada