ALEXANDRIA, Va., July 9 -- United States Patent no. 12,350,754, issued on July 8, was assigned to Arcam AB (Moelndal, Sweden).
"Electron beam source and the use of the same" was invented by Mattias Fager (Onsala, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an electron beam source for generating an electron beam comprising a cathode, an anode and a grid for regulating an electron beam current. The cathode has a base and a protrusion with sidewalls and a top surface. The base surface and the top surface are essentially flat. The base surface and the top surface are arranged at a predetermined distance from each other. The base is larger than the protrusion. The electron beam source furthe...