ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,981, issued on June 2, was assigned to MDA Systems Ltd. (Richmond, Canada).

"System, method, and satellites for surveillance imaging and earth observation using synthetic aperture radar imaging" was invented by John Bowers (Surrey, Canada), Wayne Hoyle (North Vancouver, Canada), Pat Malaviarachchi (Vancouver, Canada), Mark Senez (New Westminster, Canada), Ryan Oglow (Surrey, Canada), Alan Thompson (Vancouver, Canada), Jelena Sirovljevic (Burnaby, Canada) and Terence Lee (Vancouver, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system and method for satellite imaging are provided. The system includes a first satellite, a trailing satellite, ...