Patents by Inventor David H. Bein

David H. Bein 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).

  • Level indicating device
    Patent number: 4703315
    Abstract: A level for emitting an audio-visual signal to indicate when the level attains a vertical or an horizontal condition includes an electric power supply, an electric buzzer, an electric light emitting device, a first printed circuit board having a ring of electrically conductive material thereon, a second printed circuit board having an electrically conductive cross pattern printed thereon, and a pendulum having an electrically conducting resilient biasing member to maintain contact between the first and second boards.
    Type: Grant
    Filed: February 18, 1986
    Date of Patent: October 27, 1987
    Inventors: David H. Bein, Raymond E. Bein