ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,938, issued on Feb. 3, was assigned to BIKEFIN EBIKE INC. (Calgary, Canada).

"Electric bicycle conversion kits" was invented by Liam Nelson (Calgary, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A kit of parts for converting a regular bicycle into an e-bike. The kit includes (i) an electric motive power unit having an external freewheeling sprocket drive assembly configured for demountable engagement with the bike's chain, (ii) a rechargeable battery and battery mount for providing electric power to the electric motive power unit, (iii) a mount bracket for demountably engaging therein the electric motive power unit and for demountably engagi...