Patents Assigned to Kabushiki Kaisha Murao Shoten
  • Patent number: 4532682
    Abstract: A connection for a jewelry band including a male clasp member and a female clasp member. A resilient detent member in the form of a leaf spring having a long tongue section extending from said male clasp member at a first end thereof and a short tongue section from said long tongue section at a second end thereof. Said short tongue section normally maintains an angular posture but resiliently deflective to lie flatly against said long tongue section. Said female clasp member has at least one peripheral wall forming a hollow body and an end wall to define an insertion chamber in cooperation with said hollow body. Said end wall is formed with a slot extending to permit insertion of said long and short tongue sections while flatly lying against each other and to divide said end wall into an upper wall section and a lower section.
    Type: Grant
    Filed: September 13, 1983
    Date of Patent: August 6, 1985
    Assignee: Kabushiki Kaisha Murao Shoten
    Inventor: Masami Murao
  • Patent number: 4276086
    Abstract: A gold alloy classified into 8 to 12 carats contains 30.0 to 50.0% by weight of gold and the remainder is an alloying composition which includes 75.2-77.1% of copper, 13.6 to 16.2% of silver and 6.7 to 11.2% of zinc. The preferred alloys are 9 and 10 carats. The alloys exhibit satisfactory color tone and luster and have improved physical and chemical properties including workability, hardness, chemical resistance and perspiration resistance. The alloys are fabricated into articles which are surface finished by buffing or electrolytic polishing.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: June 30, 1981
    Assignee: Kabushiki Kaisha Murao Shoten
    Inventor: Masami Murao