Patents by Inventor Hiroyuki Mitsudo

Hiroyuki Mitsudo 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).

  • Spark-plug for automobile internal combustion engine
    Patent number: 4109633
    Abstract: Improved spark-plugs for automobile internal combustion engines are made in a manner that thermal conductance (G) from flame nucleus to the electrodes is made as small as possible through decreasing of fluid resistance with respect to minute flame nucleus gas flow in the discharge, the fluid resistance being made small by making the discharge electrodes thin or making at least one of its discharge electrodes streamlined. The spark-plugs are capable of igniting and burning such lean gas mixture of 1.25 or more in excess air ratio (F).
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: August 29, 1978
    Assignee: New Cosmos Electric Company Limited
    Inventors: Hiroyuki Mitsudo, Masazumi Yoshida