ALEXANDRIA, Va., March 24 -- United States Patent no. 12,583,374, issued on March 24, was assigned to Kawasaki Railcar Manufacturing Co. Ltd. (Kobe, Japan).

"Handrail for railroad vehicle and method for changing natural frequency of said handrail" was invented by Takahiro Kawashima (Kobe, Japan), Yu Yamamoto (Kobe, Japan), Satoru Akiyama (Kobe, Japan) and Hiroshi Enomoto (Kobe, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A handrail for a railroad vehicle is disposed in a cabin of a vehicle body of the railroad vehicle. The handrail includes a handrail body whose inside serves as a filling space and a filler having fluidity and filling the filling space. The handrail body includes an opening to be us...