Patents by Inventor Kiyoji Kawai

Kiyoji Kawai 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: 4809817
    Abstract: A controller for deciding the safety of continued elevator operation during and following an earthquake based on a comparison of currently detected seismic intensity data with stored historic intensity data. In the event the current intensities are greater than all stored data or equal to an occurrence in which faults were detected, operation is suspended at the nearest floor until a fault detection is completed. New seismic data is automatically stored along with the presence or absence of fault conditions.
    Type: Grant
    Filed: March 25, 1987
    Date of Patent: March 7, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Kiyoji Kawai
  • Patent number: 4558298
    Abstract: An elevator call entry system comprises microphones mounted on the floors or in the car, oral message recognizing units producing an oral message signal indicative of a voice calling for a call entry with statement of the floor of destination, or of a voice calling for its cancellation, when said voices are supplied to said microphones, voiceprint recognizing units operable to recognize voiceprints of the voice supplied to said microphone and to produce an output signal when the voiceprint of the voice calling for a call entry is coincident with that of the voice calling for its cancellation, and call effecting units responsive to the output of the oral message recognizing units to issue a command to enter a call to the floor of destination and operable upon reception of an output signal from the voiceprint recognizing units to issue a command to cancel the call entry.
    Type: Grant
    Filed: March 8, 1983
    Date of Patent: December 10, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kiyoji Kawai, Tadashi Omori