Patents by Inventor Teppei Ohkawa

Teppei Ohkawa 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).

  • Gas sensor
    Patent number: 4652849
    Abstract: A gas sensor has a 100-400 .mu.m thick gas-sensitive layer containing 5-30 mole % of a platinum group metal or an alloy thereof.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: March 24, 1987
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Toshitaka Matsuura, Teppei Ohkawa, Keizo Furusaki, Akio Takami