ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,552,493, issued on Feb. 17, was assigned to Shimano Inc. (Osaka, Japan).
"Derailleur hanger" was invented by Yuu Yasuda (Osaka, Japan) and Toshio Tetsuka (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A derailleur hanger includes a first portion and a second portion. The first portion includes a first part and a second part extending from the first part. The second part includes an axle receiving bore configured to receive a hub axle. The second portion is configured to support a derailleur. The first part includes a frame contact surface disposed in a reference plane extending perpendicular to a center axis of the hub axle in an installed...