Patents Represented by Law Firm Oblon, Spivak, McClelland, Maie & Neustadt
  • Patent number: 8194434
    Abstract: A resistance change memory device including: a cell array with memory cells arranged therein, the memory cell storing a resistance state as data in a non-volatile manner; a write buffer configured to supply voltage and current to a selected memory cell in accordance with data to be written in it; and a write control circuit configured to make a part of current supplied to the selected memory cell flow out in accordance with the selected memory cell's state change in a write mode.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: June 5, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Haruki Toda
  • Patent number: 7095940
    Abstract: The present invention provides an optical fiber of which a zero dispersion wavelength falls within a range of between 1,250 nm and 1,350 nm inclusive, transmission loss at 1,550 nm is equal to or less than 0.185 dB/km, chromatic dispersion at 1,550 nm is within the range of 19±1 ps/nm·km, a dispersion slope at 1,550 nm is equal to or less than 0.06 ps/nm2·km, an effective area Aeff is equal to or more than 105 ?m2, a cable cutoff wavelength ?cc is equal to or less than 1,530 nm, polarization mode dispersion is equal to or less than 0.1 ps/km1/2, and a loss when the optical fiber is wound on a mandrel having an outer diameter of 20 mm is equal to or less than 10 dB/m.
    Type: Grant
    Filed: October 1, 2003
    Date of Patent: August 22, 2006
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Shuhei Hayami, Mitsuhiro Kawasaki, Yohei Uchida
  • Patent number: 5181383
    Abstract: In a refrigerator having a compressor settled in a room temperature portion and an expander which is connected to the room temperature portion, a piston of the expander is settled in the room temperature portion and pressure variation at a low temperature portion is transferred to the piston through a gas column in a pipe connecting the room temperature portion and the low temperature portion.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: January 26, 1993
    Assignees: Research Development Corporation of Japan, Junpei Yuyama
    Inventors: Eiichi Goto, Qiquan Geng, Junpei Yuyama