Patents by Inventor Minoru Niizaki

Minoru Niizaki 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).

  • Method for driving a relay
    Patent number: 4617604
    Abstract: A method which prolongs the lifetime of relays and to prevents degraded performance of relays due to oxidized film on relay contacts is presented. The method essentially comprises the alternation of relay switch operation in dry switching mode with operation in wet switching mode. The frequency and duration of operation in wet switching mode is dependent on the characteristics (e.g. construction or materials, etc.) of the relays in use.
    Type: Grant
    Filed: January 7, 1985
    Date of Patent: October 14, 1986
    Assignee: Hewlett-Packard Company
    Inventors: Yoh Narimatsu, Minoru Niizaki