ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,536,981, issued on Jan. 27, was assigned to JORIS BEETS DESIGN Ltd. (London).
"Apparatus for lengthening the vibrating length of strings on a harp" was invented by Joris Willem Beets (London) and Olav Jens Hoekstra (Delft, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus (32) for lengthening the vibrating length of strings (34) on a harp, which apparatus (32) comprises: (i) securing means (42) for securing one end of the strings (34); (ii) adjuster members (46) for increasing the length of the strings (34) in order to increase the tension in the strings and thereby alter the frequency of vibration of the strings (34); and (iii) mount...