ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,780,378, issued on Nov. 3.
"Modified variable helix cylinders and propeller and nozzle using same" was invented by Byung Jin Kim (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a deformable variable helical cylinder fundamentally based on a helix in a space. The helix starts at a point in a space and rotates around a central axis to draw a trajectory, and has a similar shape to a common spring. The factors defining the helix are the radius, pitch, and height of the helix. A variable helix is a helix of which the radius and period are modified, and the variable helix is characterized by a form in which the radius at the lowe...