Patents by Inventor Wallace T. MacDonald

Wallace T. MacDonald 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).

  • Compact fluorescent lamp assembly having improved thermal dissipation and RFI suppression
    Patent number: 4748380
    Abstract: A fluorescent lamp assembly having an electronic ballast circuit. A ballast circuit transformer is mounted on a metallic plate having a recess complementary to the transformer, and the metallic plate suppresses conducted RFI. A lamp cover is attached to the metallic plate and heat from the ballast circuit transformer is dissipated by the metallic plate and lamp cover.
    Type: Grant
    Filed: September 27, 1983
    Date of Patent: May 31, 1988
    Assignee: North American Philips Corporation
    Inventors: Wallace T. MacDonald, Frank M. Latassa
  • Adapter for mounting a fluorescent lamp in an incandescent lamp type socket
    Patent number: 4645283
    Abstract: A compact energy-saving discharge lamp adapter with a take-apart feature for easy installation into incandescent lamp fixtures. The two-part adapter unit consists of a discharge lamp socket assembly and a ballast assembly. The discharge lamp socket assembly comprises three different electrical type connectors arranged in a special housing for lamp and ballast assembly attachment. The ballast assembly comprises a ballast, associated connectors, and special housing containing thermal conductive compound and mountable directly on the socket assembly.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: February 24, 1987
    Assignee: North American Philips Corporation
    Inventors: Wallace T. MacDonald, Frank M. Latassa
  • Compact fluorescent reflector lamp
    Patent number: D302472
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: July 25, 1989
    Assignee: North American Philips Lighting Corp.
    Inventors: Wallace T. MacDonald, Robert E. Cassidy, Harish F. Gandhi, Antonius J. M. Van Hees, Frederik H. Alkema
  • Compact fluorescent lamp
    Patent number: D302473
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: July 25, 1989
    Assignee: North American Philips Lighting Corp.
    Inventors: Wallace T. MacDonald, Robert E. Cassidy, Harish Gandhi