ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,833, issued on June 17.
"Refill ring" was invented by Joseph Grant Rouse (Fayetteville, Ark.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus and method for refilling a chalk containment pouch, also called a chalk ball/sock/sphere with a quantity of chalk. The apparatus includes a refill ring formed as a cylindrical body defining an interior passage extending between a top opening and a bottom opening. An annular groove is defined about a top end of the cylindrical body is dimensioned to receive a closure element surrounding the opening of the chalk containment pouch to secure the pouch with the refill ring. In a method of refilling the c...