Patents by Inventor Wilhelm Lepper

Wilhelm Lepper 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).

  • Patent number: 4110583
    Abstract: In an earphone construction an axially extending tubular shaped member forms a passageway or listening channel with an ear opening located between the ends of the member. A sound source is positioned in the passageway, spaced from the ear opening, for directing sound in the axial direction of the tubular member so that it flows past the ear opening. The tubular member can be U-shaped forming a headset with two ear openings or separate tubular members each with an ear opening can be joined together by a band or the like to form a headset. The ear openings can have different shapes and additional sound outlet openings, spaced from the ear openings, can be provided in the tubular member. If a U-shaped tubular member is used, the passageway between the ear openings can be open, restricted by a movable throttle or blocked by a wall.
    Type: Grant
    Filed: February 3, 1976
    Date of Patent: August 29, 1978
    Inventor: Wilhelm Lepper