ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,475,866, issued on Nov. 18.
"Harmonica reed plate and harmonica" was invented by Kuiliang Li (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention discloses a harmonica reed plate and a harmonica, and belongs to the field of musical instruments. The harmonica reed plate has different thicknesses by controlling reed slots. Specifically, a groove with fixed depth is milled on the opposite surface of the target reed slot for fixing the reeds so that the reeds obtain an optimal vibration thickness different from the thickness of the original material after fixation to customize an equivalent reed plate thickness for each reed slot (...