Patents by Inventor Hidehiro Ohwa

Hidehiro Ohwa 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).

  • Relaxor ferroelectric solid-solution single crystal, device, and method of using device
    Patent number: 7427818
    Abstract: A relaxor ferroelectric solid solution single crystal is capable of making transitions, at temperatures below the Curie temperature, between a first state which has a high permittivity and blocks optical transmission and a second state which has a low permittivity and allows optical transmission. The relaxor ferroelectric solid solution single crystal undergoes a transition to the second state if an electric field above a threshold is applied thereto in the first state. The relaxor ferroelectric solid solution single crystal undergoes a transition to the first state if heated to or above the Curie temperature in the second state.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: September 23, 2008
    Assignee: Gifu University
    Inventors: Naohiko Yasuda, Hidehiro Ohwa, Makoto Iwata
  • Relaxor ferroelectric solid-solution single crystal, device, and method of using device
    Publication number: 20070152182
    Abstract: A relaxor ferroelectric solid solution single crystal is capable of making transitions, at temperatures below the Curie temperature, between a first state which has a high permittivity and blocks optical transmission and a second state which has a low permittivity and allows optical transmission. The relaxor ferroelectric solid solution single crystal undergoes a transition to the second state if an electric field above a threshold is applied thereto in the first state. The relaxor ferroelectric solid solution single crystal undergoes a transition to the first state if heated to or above the Curie temperature in the second state.
    Type: Application
    Filed: January 28, 2005
    Publication date: July 5, 2007
    Applicant: GIFU UNIVERSITY
    Inventors: Naohiko Yasuda, Hidehiro Ohwa, Makotgo Iwata