Patents by Inventor Takafumi Ohhara

Takafumi Ohhara 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 producing discharge in gas laser at low voltage
    Patent number: 4417340
    Abstract: In a gas laser in which a mixture of gases is excited under the influence of an electric field, a first constituent gas of the mixture is introduced into a laser tube to allow a discharge to occur in the introduced gas at predetermined partial pressure. A second constituent gas of the mixture is then introduced into the laser tube until the combined gases reach the normally operating pressure of the mixture to allow a discharge to occur in the later introduced gas.
    Type: Grant
    Filed: April 3, 1981
    Date of Patent: November 22, 1983
    Assignee: Matsushita Electric Industrial Company, Limited
    Inventors: Naoya Horiuchi, Takafumi Ohhara, Reiji Sano