Patents by Inventor Gerald R. Drennan

Gerald R. Drennan 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).

  • Combination diffused and directed infrared transceiver
    Patent number: 5808769
    Abstract: An infrared transceiver for use with a computer in a wireless Local Area Network. The transceiver comprises a light emitting diode array and photodiodes. The transceiver is operable in a diffused beam arrangement and a directed beam arrangement. The transceiver is converted to directed beam operation by attaching a user installable collimator. The collimator redirects the beams into parallel beams, and the direction of the parallel beams is controlled through an adjustable tilt stand. The collimator is detachable for converting back to diffused beam operation.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: September 15, 1998
    Assignee: International Business Machines Corporation
    Inventors: Albert J. Kerklaan, Gerald R. Drennan, Ravi S. Ananth, Michael J. Preyde