Patents by Inventor David Koll

David Koll 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).

  • Projection lamp test device
    Patent number: 8026724
    Abstract: A projector lamp electronic test circuit is provided. The test circuit includes an electrical connector configured to be operatively coupled to a lamp of a projection unit under test, a converter configured to receive a test charge to be sent to the lamp from an alternating current power source, the converter configured to convert the test charge from alternating current to direct current, and an autotransformer operatively coupled to the converter, the autotransformer configured to regulate a voltage of the test charge, the voltage being suitably high enough to cause failure of the lamp.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: September 27, 2011
    Assignee: Seiko Epson Corporation
    Inventors: David Koll, Tom Else
  • PROJECTION LAMP TEST DEVICE
    Publication number: 20090001991
    Abstract: A projector lamp electronic test circuit is provided. The test circuit includes an electrical connector configured to be operatively coupled to a lamp of a projection unit under test, a converter configured to receive a test charge to be sent to the lamp from an alternating current power source, the converter configured to convert the test charge from alternating current to direct current, and an autotransformer operatively coupled to the converter, the autotransformer configured to regulate a voltage of the test charge, the voltage being suitably high enough to cause failure of the lamp.
    Type: Application
    Filed: June 27, 2008
    Publication date: January 1, 2009
    Applicant: INFOCUS CORPORATION
    Inventors: David Koll, Tom Else