ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,736, issued on Dec. 9, was assigned to HITACHI ASTEMO LTD. (Ibaraki, Japan).
"Shock absorber" was invented by Mikio Yamashita (Hitachinaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "This shock absorber has a first damping force characteristic that is exhibited when a piston speed is from a low-speed region to a high-speed region while a relative position of a piston with respect to a cylinder is in a first range during a low frequency, a second damping force characteristic greater than the first damping force characteristic is exhibited when the piston speed is from the low-speed region to the high-speed region while the relative position ...