ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,967, issued on Aug. 5, was assigned to Edwards Japan Ltd. (Chiba, Japan).
"Vacuum pump" was invented by Shigeyoshi Nakatsuji (Chiba, Japan) and Yoshiyuki Sakaguchi (Chiba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vacuum pump includes a casing having an inlet port, and enclosing a rotating body, a thread groove stator which is substantially cylindrical and is disposed on an outer periphery of the rotating body, and a thread groove which is formed in at least one of an outer peripheral surface of the rotating body and an inner peripheral surface of the thread groove stator, the vacuum pump exhausting gas sacked from a side of the inlet po...