Patents by Inventor Hiroaki Sata

Hiroaki Sata 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).

  • Phase difference plate comprising polymer film containing compound having rod- shaped molecular structure
    Publication number: 20040096594
    Abstract: A phase difference plate which comprises one sheet of polymer film containing a compound having a rod-shaped molecular structure and exhibiting a maximum absorption wavelength (&lgr;max) of less than 250 nm in an ultraviolet spectrum of its solution and which exhibits a retardation value as measured at a wavelength of 450 nm (Re450) of 60 to 135 nm and a retardation value as measured at a wave-length of 590 nm (Re590) of 100 to 170 nm, where the relationship: Re590-Re450≧2 nm is satisfied. The phase difference plate functions as a &lgr;/4 plate.
    Type: Application
    Filed: September 12, 2003
    Publication date: May 20, 2004
    Inventors: Hiroshi Takeuchi, Hiroaki Sata, Hiroyuki Kawanishi, Takamichi Fujii