ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,760, issued on Nov. 18.
"Method and apparatus of a positive door chain locking mechanism" was invented by Paul Leroy Baehl (Evansville, Ind.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The positive door chain locking mechanism is a retrofitting kit comprises a rotating lock mounted to a prior art mounting plate of a prior art door chain mechanism. The rotating lock rotates easily to a positive locking resting position by counter balance, preventing the removal of a prior art slide pin and a prior art chain from a slot in the prior art mounting plate. The rotating lock rotates easily to a positive unlocking resting position by counter balance, per...