US Patent Issued to Roto Frank Fenster-und Tuertechnologie on Dec. 2 for "Window or door with a precisely controlling, but flexibly usable, sash stop mechanism" (German Inventors)

ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,703, issued on Dec. 2, was assigned to Roto Frank Fenster-und Tuertechnologie GmbH (Leinfelden-Echterdingen, Germany).

"Window or door with a precisely controlling, but flexibly usable, sash stop mechanism" was invented by Michael Metzger (Waldenbuch, Germany), Stefan Fingerle (Reutlingen-Rommelsbach, Germany), Martin Krebs (St. Johann, Germany) and Ulrich Pfeiffer (Hemmingen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A window or a door has a fixed frame and a sash movable relative to the fixed frame. The sash is supported on a running rail of the fixed frame via at least one carriage with at least one roller. The sash can be moved trans...