Patents by Inventor Kazunori Hatakeyama

Kazunori Hatakeyama 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).

  • Publication number: 20110132899
    Abstract: To obtain a converter circuit capable of being made to be small and light-weighted and reducing switching loss, a motor drive control apparatus, an air-conditioner, a refrigerator, and an induction heating cooker provided with the circuit. There are provided: a step-up converter 3a including a rectifier 2, a step-up reactor 4a, a switching element 5a, and a reverse current prevention element 6a; a step-up converter 3b having a step-up reactor 4b, a switching element 5b, and a reverse current prevention element 6b and connected in parallel with the step-up converter 3a; switching control means 7 that controls switching elements 5a and 5b; and a smoothing capacitor that is provided at the output of the step-up converters 3a and 3b. The switching control means 7 switches the current mode of the current flowing through the step-up reactors 4a and 4b into any of a continuous mode, a critical mode, and a discontinuous mode based on a predetermined condition.
    Type: Application
    Filed: March 17, 2009
    Publication date: June 9, 2011
    Inventors: Takuya Shimomugi, Yosuke Shinomoto, Kazunori Sakanobe, Michio Yamada, Kazunori Hatakeyama
  • Patent number: 6231858
    Abstract: A process for producing boluses for radiotherapy, which are disposable and excellent in processability. Natural organic polymers used as gelatinization preparations are added in water not higher than 10%, and more preferably 2-5% of water in order to produce a hydro gel comprising natural organic polymers. Then, the boluses which have equivalent to human body and are inexpensive, disposable, and excellent in processability can be obtained.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: May 15, 2001
    Assignee: Mochida Corporation
    Inventors: Shin Izeki, Kazunori Hatakeyama, Fumitaka Ebihara, Yoshinori Koga