ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,764, issued on May 20, was assigned to Amrita Vishwa Vidyapeetham (India).
"Tubular hydro-voltaic device" was invented by Sujith Lal (Tamil Nadu, India) and Sudip Batabyal (Tamil Nadu, India).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention discloses a tubular hydro-voltaic device configured to generate voltage and current. The device includes a tubular structure containing activated porous carbon of predetermined thickness and length. The tubular structure is placed in a reservoir of fluid whereby the contact between the tubular structure and fluid produces a capillary action of the fluid into the tubular structure forming an electric do...