ALEXANDRIA, Va., May 19 -- United States Patent no. 12,633,838, issued on May 19, was assigned to Electric Hydrogen Co. (Devens, Mass.).

"Invariable-change-component-based power converter" was invented by Adam Libert (Pacifica, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system and method of operation which includes a variable transformer coupled to an invariable rectifier, an invariable inverter, and/or other invariable change component. The variable transformer may be used to control power conversion levels. In some cases, the system may have bandwidth to support controlled power supply for one or more electrolyzer stacks."

The patent was filed on Dec. 21, 2022, under Application No. 18/703,89...