Patents Assigned to Tomei Sangyo Kabushiki Kaisha
  • Hydrogel fundamental material
    Patent number: 4699946
    Abstract: An optically transparent hydrogel forming material comprising a copolymer of an optically transparent polyester having a molecular weight of 1,000 to 100,000 and at least one of polymerizable group in its molecule and N-vinyllactam. The hydrogel forming material has an excellent optical property, high gas-permeability and excellent mechanical property.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: October 13, 1987
    Assignee: Tomei Sangyo Kabushiki Kaisha
    Inventors: Yasukichi Yanagihara, Takuo Kato
  • Electrolytic sterilizer for contact lenses
    Patent number: 4512865
    Abstract: An electrolytic sterilizer for contact lenses comprising a main body accommodating a power source unit and a sterilizing container detachably mountable on the main body and having electrodes electrically connectable, through container-side contacts and main body-side contacts, to said power source for electrolysis, wherein the main body has a groove for a waste solution, and the main body-side contacts are located outside of the groove.
    Type: Grant
    Filed: June 6, 1984
    Date of Patent: April 23, 1985
    Assignees: Tanica Electric Co., Ltd., Tomei Sangyo Kabushiki Kaisha
    Inventor: Masakatu Yamauchi