ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,291, issued on Jan. 20, was assigned to FASTCAP ULTRACAPACITORS LLC (Woburn, Mass.).

"Power system for downhole toolstring" was invented by Riccardo Signorelli (The Woodlands, Texas) and John J. Cooley (Boston).

According to the abstract* released by the U.S. Patent & Trademark Office: "A downhole power system includes an energy storage adapted to operate at high temperatures, and a modular signal interface device that serves to control the energy storage component as well as offer a means of data logging at high temperatures. The controller is fabricated from pre-assembled components that may be selected for various combinations to provide desired functionality. The energy stora...