ALEXANDRIA, Va., May 26 -- United States Patent no. 12,640,552, issued on May 26, was assigned to DC Systems B.V. (Aalsmeer, Netherlands).
"Residual current device with controlled discharge" was invented by Henricus David Stokman (Aalsmeer, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A direct current residual current protection device having a controlled current discharge having a positive and a negative input terminal, a positive and a negative output terminal, a first switch, a controller and a discharge control circuit. The first switch is interposed between the positive input terminal and the positive output terminal and operatively opens/closes an electrical connection between the positiv...