Patents by Inventor Darrell K. Welch

Darrell K. Welch 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).

  • Unmanned aircraft
    Patent number: D280007
    Type: Grant
    Filed: January 10, 1980
    Date of Patent: August 6, 1985
    Assignee: Northrop Corporation
    Inventors: Chris Benneche, Richard W. Cronin, Eugene M. Linhart, Richard L. Ranes, Darrell K. Welch