Patents by Inventor David E. Maxwell

David E. Maxwell 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).

  • Remote starter switch
    Patent number: D246972
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: January 17, 1978
    Assignee: Sun Electric Corporation
    Inventors: David E. Maxwell, James R. Shaffer, Lee Radtke
  • Timing light
    Patent number: D248630
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: July 25, 1978
    Assignee: Sun Electric Corporation
    Inventors: David E. Maxwell, James R. Shaffer, Lee Radtke
  • Inductive clamp
    Patent number: D249876
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: October 10, 1978
    Assignee: Sun Electric Corporation
    Inventors: David E. Maxwell, James R. Shaffer, Lee Radtke
  • Dwell/tachometer
    Patent number: D250178
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: November 7, 1978
    Assignee: Sun Electric Corporation
    Inventors: David E. Maxwell, James R. Shaffer, Lee Radtke
  • Engine exhaust emission analyzer
    Patent number: D257013
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: September 23, 1980
    Assignee: Sun Electric Corporation
    Inventors: James R. Shaffer, David E. Maxwell, Lee Radtke
  • Engine exhaust emission analyzer
    Patent number: D257331
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: October 14, 1980
    Assignee: Sun Electric Corporation
    Inventors: James R. Shaffer, David E. Maxwell, Lee F. Radtke