Patents by Inventor David S. Marks

David S. Marks 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).

  • Sound actuated switch
    Patent number: 4690242
    Abstract: A sound actuated detector comprising a microphone, an elastic cylinder having a flexible bottom adapted to fit tightly around the microphone with the sensing surface of the microphone fitting tightly against the flexible bottom, a mounting base connected to the surface of the cylinder having the flexible bottom, an elastic isolating medium arranged between the base and the surrounding surface to which the detector is attached, and a weight connected to the microphone having a mass such as to eliminate movement of the microphone in response to frequencies above a selected frequency.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: September 1, 1987
    Inventor: David S. Mark
  • Double helix bookcase
    Patent number: D316195
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: April 16, 1991
    Assignee: Space Age Design Furniture
    Inventor: David S. Mark
  • Chaise
    Patent number: D392807
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: March 31, 1998
    Inventor: David S. Marks
  • Lounge
    Patent number: D393754
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: April 28, 1998
    Inventor: David S. Marks
  • Chair
    Patent number: D396153
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: July 21, 1998
    Inventor: David S. Marks