ALEXANDRIA, Va., March 24 -- United States Patent no. RE50,839, issued on March 24, was assigned to MEADOW STREAM DISTRIBUTING LLC (Bettendorf, Iowa).

"Warning light controller" was invented by Richard Freitag Engstrom (Bettendorf, Iowa) and Chih Heng Lin (Taipei City, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A controller for a warning light is disclosed. The controller is composed of a housing, a light emitting element and a control unit. The control unit is in operable communication with the light emitting element of the controller and a light emitting element of a warning light. The controller instructs the light emitting element of the warning light and the light emitting element of the cont...