Patents by Inventor Masakazu Mizuno

Masakazu Mizuno 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).

  • Patent number: 4274423
    Abstract: A catheter tip pressure transducer for detecting the pressure in various portions of a living body accurately and safely comprises a pressure sensor disposed within the end portion of a catheter. The pressure sensor comprises a pressure sensitive diaphragm whereon strain gauges are formed by a diffusion method. The pressure sensor is mounted on an insulated supporting member without being secured firmly thereto. A protecting member made of silicone rubber fills the hollow portion of the catheter so as to isolate and protect the pressure sensor and the ambient body tissue.Pressure is accurately measured by the pressure sensor without being influenced by the thermal stresses which occur in the supporting member. Furthermore, electrical isolation and mechanical safety are obtained.
    Type: Grant
    Filed: December 8, 1978
    Date of Patent: June 23, 1981
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Masakazu Mizuno, Isemi Igarashi, Hazime Inagaki
  • Patent number: 4246908
    Abstract: An intracranial pressure transducer includes a casing comprising an annular member having a screwed part on an outer wall thereof for fitting and securing a skull of a body. A pressure-electric transducing portion including a supporting member which is inserted within an inner wall of the casing and is tightly fixed to the predetermined upper portion from a tip portion of the casing, an indicating circuit for indicating the intracranial pressure in response to an output of strain sensitive elements, and indicating means.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: January 27, 1981
    Assignee: Kabushiki Kaisha Toyota Kenkyusho
    Inventors: Hazime Inagaki, Masakazu Mizuno, Isemi Igarashi