Patents by Inventor Yasuhiro Tomiyoshi

Yasuhiro Tomiyoshi 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 producing L-tryptophan by culturing a Corynebacterium glutamicum mutant
    Patent number: 5275940
    Abstract: Disclosed is a process for producing L-tryptophan which comprises culturing in a medium a microorganism belonging to the genus Corynebacterium or Brevibacterium having resistance to an aminoquinoline derivative or a phenothiazine derivative and an ability to produce L-tryptophan until L-tryptophan is accumulated in the culture and recovering L-tryptophan therefrom.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: January 4, 1994
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Kuniki Kino, Kazuhiro Furukawa, Yasuhiro Tomiyoshi, Yoshiyuki Kuratsu