Patents by Inventor Tsutomu Yamafuji

Tsutomu Yamafuji 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).

  • Process for production of aminoglycoside antibiotics
    Patent number: 4279997
    Abstract: Aminoglycoside antibiotics biochemically transformed from Kanamycin A or Kanamycin B, which are represented by the formula ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group and R.sub.2 represents an amino group or a hydroxyl group.
    Type: Grant
    Filed: September 5, 1979
    Date of Patent: July 21, 1981
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Yoshihiko Oka, Hitoshi Ishida, Moto Morioka, Yoso Numusaki, Tsutomu Yamafuji, Takashi Osono, Hamao Umezawa
  • Aminoglycoside antibiotics and process for production thereof
    Patent number: 4209511
    Abstract: Aminoglycoside antibiotics biochemically transformed from Kanamycin A or Kanamycin B, which are represented by the formula ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group and R.sub.2 represents an amino group or a hydroxyl group.
    Type: Grant
    Filed: January 3, 1979
    Date of Patent: June 24, 1980
    Assignees: Yamanouchi Pharmaceutical Co., Ltd., Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai
    Inventors: Yoshihiko Oka, Hitoshi Ishida, Moto Morioka, Yoso Numasaki, Tsutomu Yamafuji, Takashi Osono, Hamao Umezawa