Patents by Inventor Alan E. Stevens

Alan E. Stevens 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).

  • All-terrain vehicle safety rack system
    Patent number: 6059496
    Abstract: An all-terrain vehicle safety rack system including a base frame having two parallel rails with two parallel spacer bars coupled therebetween to maintain the rails at a fixed predetermined distance.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: May 9, 2000
    Inventor: Alan E. Stevens
  • Audio teleconferencing
    Patent number: 4237339
    Abstract: An electro-acoustic terminal unit for use in an audio teleconferencing system comprises a loudspeaker and one or more microphones each having a sensitivity which is directionally dependent and exhibits at least one null or substantially null position. The loudspeaker and microphones are rigidly mounted on a boom and the microphones are so located and orientated relative to the loudspeaker that the null position is directed towards the loudspeaker.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: December 2, 1980
    Assignee: The Post Office
    Inventors: John G. Bunting, Robin C. Cross, David R. Guard, Ian S. Groves, Edward G. T. Johnson, Alan E. Stevens