Patents by Inventor Tatsumi Shohji

Tatsumi Shohji 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).

  • Liquid jet recording head with a protective layer formed by converting the surface of a transducer into an insulating material
    Patent number: 4694306
    Abstract: A liquid jet recording head comprises a liquid discharging portion having an orifice for discharging liquid to form liquid droplets and a heat acting zone communicated with said orifice at which heat energy for forming flying liquid droplets acts on the liquid, and an electrothermal transducer, having at least a pair of confronting electrodes connected electrically to a heat generating resistance layer provided on a substrate thereby to form a heat generating portion between these electrodes, which includes a protecting layer which is formed by modification of the surfaces of said electrodes and is made into an insulating inorganic material.
    Type: Grant
    Filed: May 20, 1986
    Date of Patent: September 15, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masami Ikeda, Hiroto Matsuda, Hiroto Takahashi, Tatsumi Shohji