Patents by Inventor Tadao Ishii

Tadao Ishii 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).

  • Apparatus and method for routing control for composite network
    Patent number: 5483589
    Abstract: In a routing control apparatus and method for a composite network, a decision is automatically made as to whether a connection to a public telephone network via a leased line is allowed, by examining the dial information entered from a calling party and judging the communications applicable to the receiving node, the type of communication requested, and other factors. A connection judging unit extracts, from the dial information entered by the calling party, a node identifier CC for specifying the receiving node and a connecting type identifier V/F for directing the initiation of judgment as to whether a connection to a public network via a leased line is allowed and for providing a parameter for determining the type of communication requested, and which judges, based on the extracted identifiers CC and V/F, whether a connection to a public telephone network accommodating the called party is allowed via a leased line destined for a receiving node.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: January 9, 1996
    Assignee: Fujitsu Limited
    Inventors: Kazunori Ishida, Tadao Ishii, Hiroyoshi Mori, Susumu Akizuki, Akihisa Ogino
  • Virtual private network connecting system
    Patent number: 5339356
    Abstract: A virtual private network connecting system in a virtual private network is formed by accommodating in a public network a plurality of PBX units each assigned a unique private office number (ON), the system executed by the units comprising in each of the PBX unit.
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: August 16, 1994
    Assignee: Fujitsu Limited
    Inventor: Tadao Ishii
  • N-alkylbenzenesulfonylcarbamoyl-5-chloroisothiazole derivatives and microbicides containing the same
    Patent number: 5045555
    Abstract: A novel compound represented by the formula (I) ##STR1## wherein R represents a lower alkyl group having 1 to 4 carbon atoms which has an intense microbicidal activity over a wide range of microorganisms and is applicable to a microbicide.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: September 3, 1991
    Assignee: Meiji Seika Kaisha Ltd.
    Inventors: Kuniomi Matsumoto, Mikio Munakata, Tadao Ishii, Tetsuro Watanabe
  • Spectrofluorophotometer with monitor detector for light source
    Patent number: 4779982
    Abstract: A spectrofluorophotometer enabling spectrum correcting treatment to be done highly accurately, including an intercepter the incident light in a fluorescence detecting system, and an interceptor intercepting the incident light in a monitoring detecting system, so as to carry out zero point correction for both of these detecting systems.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: October 25, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Koshi, Shunichi Matuura, Minoru Owada, Hiroshi Hirose, Tadao Ishii
  • Method for removing vanadium, nickel, and sulfur from hydrocarbon oils
    Patent number: 3936371
    Abstract: A hydrocarbon oil, particularly a heavy hydrocarbon oil, containing vanadium, nickel, sulfur and asphaltenes is brought into contact with red mud at an elevated temperature in the presence of hydrogen. The treatment removes vanadium, nickel and asphaltenes from oil in high yields.
    Type: Grant
    Filed: March 14, 1974
    Date of Patent: February 3, 1976
    Assignee: Agency of Industrial Science & Technology
    Inventors: Shigeru Ueda, Yoshinori Nakata, Shinichi Yokoyama, Naoyuki Todo, Yuji Yoshida, Tadao Ishii, Gen Takeya