Patents by Inventor Shigetomo Umitsu

Shigetomo Umitsu 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).

  • Speaker system with vibration isolation speaker unit mounting structure
    Patent number: 6058199
    Abstract: To prevent the generation of audible resonation of the baffle plate by rigid connection of the weighty speaker unit, the speaker system having a cabinet including a speaker unit uses a support structure which allows movement of the speaker unit in its axial direction, and a flexible seal member fitted into a gap formed between the baffle plate of the cabinet and the frame of the speaker unit or a sub-baffle connected to the frame of the speaker unit. In one embodiment, the support structure includes a swingable plate to which the speaker unit is fixed. A clamp device is provided to prevent movement of the movable part during the transportation of the speaker system.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: May 2, 2000
    Inventor: Shigetomo Umitsu