Patents by Inventor Takuya Kotani

Takuya Kotani 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).

  • Recording apparatus
    Publication number: 20020034144
    Abstract: An apparatus for recording second audio data on a recording medium on which first audio data including a plurality of first audio packets each containing audio information is recorded. One of the plurality of first audio packets is designated and the second audio data is recorded on the recording medium together with identification data for identifying the designated first audio packet.
    Type: Application
    Filed: September 10, 2001
    Publication date: March 21, 2002
    Inventor: Takuya Kotani
  • Method for producing L-3,4-dihydroxyphenylalanine by precipitation of anhydrous crystals
    Patent number: 5518905
    Abstract: A method for producing L-3,4-dihydroxyphenylalanine comprising contacting microorganism cells having .beta.-tyrosinase activity with catechol, pyruvic acid and ammonium ion or with catechol and L-serine, at a temperature lower than 25.degree. C. in the presence of anhydrous crystals of L-3,4-dihydroxyphenylalanine. L-3,4-dihydroxyphenylalanine formed from said contacting precipitates as anhydrous crystals in the reaction mixture, and the thus-precipitated anhydrous crystals can be collected. According to the method of the present invention, crude crystals of L-3,4-dihydroxyphenylalanine having a high purity may be obtained at a high yield of recovery.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: May 21, 1996
    Assignee: Ajinomoto Co., Inc.
    Inventors: Takuya Kotani, Katsuo Iizumi, Makoto Takeuchi
  • Method of producing trehalose by microorganisms which can produce tremalose with sucrose or maltose as main carbon source
    Patent number: 5484714
    Abstract: A method of producing trehalose, in which a microorganism belonging to the genus Brevibacterium, Corynebacterium, Microbacterium or Arthrobacter and having the ability to produce trehalose is incubated in a liquid medium containing sucrose or maltose as an essential carbon source and the trehalose produced and accumulated in the culture is collected therefrom. Trehalose is produced inexpensively and efficiently by industrial mass-production.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: January 16, 1996
    Assignee: Ajinomoto Co., Inc.
    Inventors: Takayasu Tsuchida, Yutaka Murakami, Yoshitaka Nishimoto, Takuya Kotani
  • Method for increasing beta-tyrosinase activity in Erwinia herbicola
    Patent number: 5368981
    Abstract: A method for increasing .beta.-tyrosinase activity in Erwinia herbicola is disclosed. The activity is increased by culturing the microorganism until it reaches stationary phase and maintaining the stationary phase for a period of 6 to 24 hours while maintaining the pH between 7.0 and 8.3.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: November 29, 1994
    Assignee: Ajinomoto Co., Inc.
    Inventors: Takayasu Tsuchida, Yoshitaka Nishimoto, Takuya Kotani, Katsuo Iizumi
  • Method for producing L-3, 4-dihydroxyphenyalanine by Erwinia having tyrosinase activity
    Patent number: 5338672
    Abstract: The present invention relates to improved methods for producing L-3, 4-dihydroxyphenylalanine from catechol, pyruvic acid and ammonium ion, or catechol and L-serine, by utilizing .beta.-tyrosinase activity of a microorganism which belongs to the genus Erwinia. According to the method of the present invention, L-3,4-dihydroxyphenylalanine can be produced at a lower cost and higher efficiency as compared with that in the conventional method.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: August 16, 1994
    Assignee: Ajinomoto Co., Inc.
    Inventors: Takayasu Tsuchida, Yoshitaka Nishimoto, Takuya Kotani, Katsuo Iizumi