May. 14, 2021
A Better Mouse Trap, Revisited Included in this month’s list is patent #10950211, by Kah. Entitled External ear insert for hearing comprehension enhancement, it appears to be a Helmhotz-type resonating device placed somewhere in the ear to shift natural pinna and canal resonances. Compare this to Goode’s patent #4556122, Ear acoustical hearing aid, which aimed in the same direction