Patents by Inventor Fumio Andou

Fumio Andou 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).

  • Water leakage monitoring apparatus
    Patent number: 6404343
    Abstract: A water leakage detecting apparatus is capable of detecting water leakage of a water pipe precisely and at low cost. The water leakage monitoring apparatus includes vibration/electric converter for converting an acoustic vibration transmitted to a water pipe into an electrical signal. A signal discriminator processes an output signal of the vibration/electric converter to detect a signal of a predetermined band being held below a predetermined level continuously beyond a continuing condition to generate a sound interruption detection signal. A counter counts the number of occurrences of the sound interruption detection signal.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: June 11, 2002
    Assignees: ACT LSI Inc., Aqus Co., Ltd.
    Inventors: Fumio Andou, Hiroshi Abe