Patents by Inventor Keith Alan Lyszkowski

Keith Alan Lyszkowski 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).

  • Multiple fan system having means for reducing beat frequency oscillations
    Patent number: 6276900
    Abstract: A multiple fan system including at least two simultaneously operated fans. Each of the fans are operable as a constant speed fan and as an oscillating speed fan. Not more than one of the fans is operated as a constant speed fan. Each fan not being operated as a constant speed fan is operated as an oscillating speed fan. A fan controller operates each oscillating speed fan in a mode whereby a respective acoustic emission having a range of frequency different than any other oscillating speed fans is produced.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: August 21, 2001
    Assignee: Dell USA, L.P.
    Inventors: Keith Alan Lyszkowski, Douglas E. Wallace, Jr.
  • Multiple fan having means for reducing beat frequency oscillations
    Patent number: 6270319
    Abstract: A multiple fan system including at least two simultaneously operated fans. Each of the fans are operable as a constant speed fan and as an oscillating speed fan. Not more than one of the fans is operated as a constant speed fan. Each fan not being operated as a constant speed fan is operated as an oscillating speed fan. A fan controller operates each oscillating speed fan in a mode whereby a respective acoustic emission having a range of frequency different than any other oscillating speed fans is produced.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: August 7, 2001
    Assignee: Dell USA, L.P.
    Inventors: Keith Alan Lyszkowski, Douglas E. Wallace, Jr.
  • Multiple fan system having means for reducing beat frequency oscillations
    Patent number: 6257832
    Abstract: A multiple fan system including at least two simultaneously operated fans. Each of the fans are operable as a constant speed fan and as an oscillating speed fan. Not more than one of the fans is operated as a constant speed fan. Each fan not being operated as a constant speed fan is operated as an oscillating speed fan. A fan controller operates each oscillating speed fan in a mode whereby a respective acoustic emission having a range of frequency different than any other oscillating speed fans is produced.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: July 10, 2001
    Assignee: Dell USA, L.P.
    Inventors: Keith Alan Lyszkowski, Douglas E. Wallace, Jr.