Patents by Inventor Frederick Maruyama

Frederick Maruyama 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).

  • Multi-unit pulsatile delivery system
    Patent number: 5017381
    Abstract: The present invention is directed to an active agent dispenser for use in a fluid-containing environment, which dispenser comprises a rigid housing, a plurality of movable active agent units filling a portion of the housing, a fluid-activated driving member for dispensing the active agent units filling the remainder of the housing, and an active agent unit outlet means. In the present invention, each active agent unit is comprised of an active agent dosage or filling contained within a fluid-impermeable cup-shaped member, the cup-shaped members being oriented within the housing with the base of the cup-shaped members facing the outlet means.
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: May 21, 1991
    Assignee: Alza Corporation
    Inventors: Frederick Maruyama, Richard Cortese