ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,774,084, issued on Oct. 27, was assigned to Athule Aero Technologies Inc. (Waco, Texas) and WISNIEWSKI ENTERPRISES (Monument, Colo.).

"Propeller with unloaded tip zone and method" was invented by Kenneth W. Van Treuren (Waco, Texas) and Charles F. Wisniewski (Monument, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a rotating propeller design that maintains a high efficiency and reduces noise. The design provides an unloaded tip zone of positive lift starting prior to an end of the tip with negligible, if any, positive lift that is counterintuitive to the purpose of a propeller. The unloaded tip zone decreases the s...