Patents by Inventor Shigeru Hasegawa

Shigeru Hasegawa 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).

  • Oxetanocin-related compounds and pharmaceutical compositions containing them
    Patent number: 5041447
    Abstract: This invention relates to oxetanocin-related compounds represented by the following formula (I): ##STR1## [in formula (I), R.sub.1, Y and B have the following meanings: (a) R.sub.1 represents --CH.sub.2 OH or --CH.sub.2 OCO-(alkyl),(b) Y represents ##STR2## provided that R.sub.2 is --H, --OH or --CH.sub.2 OH and R.sub.3 is --H, --OH, halogen atom, --CH.sub.2 OH, lower alkyl group, --CH.sub.2 -N.sub.3, --CH.sub.2 -F, --N.sub.3, --COOH, --NH.sub.2, --CH.sub.2 OSO.sub.3 H or --CH.sub.2 OCO-(lower alkyl), and(c) B represents a residue of purine base,(d) provided that R.sub.1 and R.sub.3 cannot simultaneously represents --CH.sub.2 OH]and their salts which have activities such as an antiviral activity and the like and are expectedly useful as a pharmaceutical and the like.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: August 20, 1991
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Seiichi Saito, Shigeru Hasegawa, Katsutoshi Takahashi, Nobuyoshi Shimada, Jun-ichi Seki, Hiroo Hoshino, Yukihiro Nishiyama, Kenichi Matsubara, Takemitsu Nagahata
  • Digital-analog converter
    Patent number: D315723
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: March 26, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Haruki Takita, Minoru Sube
  • Digital audio disc player
    Patent number: D315905
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: April 2, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Haruki Takita, Minoru Sube
  • Tape recorder
    Patent number: D316860
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: May 14, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Yuji Sato, Yukio Iikura
  • Musical instrument digital interface controller
    Patent number: D317918
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: July 2, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Koji Suzuki
  • Digital audio disc player
    Patent number: D318664
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: July 30, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube
  • Combined tape player and tuner
    Patent number: D318665
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: July 30, 1991
    Assignee: TEAC Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Hiroyuki Watanabe, Keiji Tsunoda, Manami Fujino, Yukio Iikura
  • Combined tape player and tuner
    Patent number: D319236
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: August 20, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Hiroyuki Watanabe, Keiji Tsunoda, Manami Fujino, Yukio Iikura
  • Tape recorder
    Patent number: D319237
    Type: Grant
    Filed: November 29, 1989
    Date of Patent: August 20, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Katsuhiro Takashima, Haruki Takita, Hiroyuki Watanabe
  • Digital audio disc player
    Patent number: D321189
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: October 29, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube
  • Digital audio disc player
    Patent number: D321190
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: October 29, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Katsuhiro Takashima
  • Digital audio disc player
    Patent number: D321191
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: October 29, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Hiroyuki Watanabe
  • Combined digital audio disc player, tuner and tape recorder
    Patent number: D321194
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: October 29, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Yuji Sato
  • Data recorder/reproducer
    Patent number: D321876
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: November 26, 1991
    Assignee: TEAC Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Katsuhiro Takashima
  • Streaming cassette tape drive
    Patent number: D322247
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: December 10, 1991
    Assignee: TEAC Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Katsuhiro Takashima, Keiji Tsunoda
  • Streaming cassette tape drive
    Patent number: D322431
    Type: Grant
    Filed: December 7, 1989
    Date of Patent: December 17, 1991
    Assignee: TEAC Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Katsuhiro Takashima, Keiji Tsunoda
  • Streaming cassette tape drive
    Patent number: D322600
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: December 24, 1991
    Assignee: Teac Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Katsuhiro Takashima, Keiji Tsunoda
  • Streaming cassette tape drive
    Patent number: D322779
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: December 31, 1991
    Assignee: TEAC Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Katsuhiro Takashima, Keiji Tsunoda
  • Streaming cassette tape drive
    Patent number: D322964
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: January 7, 1992
    Assignee: TEAC Corporation
    Inventors: Masafumi Ito, Shigeru Hasegawa, Minoru Sube, Katsuhiro Takashima, Keiji Tsunoda
  • Remote controller for tape recorder
    Patent number: D323507
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: January 28, 1992
    Assignee: TEAC Corporation
    Inventors: Masafumi Ito, Koji Suzuki, Shigeru Hasegawa, Minoru Sube, Katsuhiro Takashima