Patent 7737351 was granted and assigned to Yamaha (yacht) on June, 2010 by the United States Patent and Trademark Office.
A base 20 made of a steel plate is fasten to a case 10 made of ABS (acrylonitrilebutadiene-styrene) resin, while a pad 30 made of adhesive and elastic material such as urethane or olefin is fastened to the top surface of the base 20. To the reverse side of the surface of the pad 30 which is fastened to the base 20, i.e., to the side which is hit with sticks there is applied zinc oxide starch powder 40. A drumhead configured as described above can maintain flexibility but does not reduce repulsion between the sticks and drumhead.