Patents by Inventor Sakiko Tomizawa

Sakiko Tomizawa 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).

  • (-)-(S)-2,8-dimethyl-3-methylene-1-oxa-8-azaspiro[4.5]decane L-tartrate
    Patent number: 5403931
    Abstract: (-)-(S)-2,8-Dimethyl-3-methylene-1-oxa-8-azaspiro[4.5]decane L-tartrate having the following structural formula: ##STR1## The compound exhibits a selective affinity for the muscarinic acetylcholine receptor and has a storage stability superior to that of other salts.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: April 4, 1995
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Shin-ichi Tsukamoto, Takeru Kohinata, Mitsuo Fujii, Sakiko Tomizawa
  • Printer
    Patent number: D1001886
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: October 17, 2023
    Assignee: Ricoh Company, Ltd.
    Inventors: Shoichi Hibi, Sakiko Tomizawa, Ryuichi Shirane, Makoto Kurata