Abstract: A timpani percussion mallet for use with a timpani musical instrument by a timpani player, the mallet comprising: a shaft having a first end that is for a timpani player to hold, and also having an opposite second end that is for the timpani player striking a part of the timpani musical instrument, wherein the shaft comprises at least one tube with outer walls, wherein the tube contains within the outer walls a plurality of segments including a first segment comprising a first solid segment material and a second solid segment comprising a second segment material different from the first solid segment material, and optional additional segments with optional additional solid segment materials, wherein the first and second segments are each non-movable within the tube, wherein the first segment is located closer to the first end, and the second segment is located closer to the second end, wherein the first segment and the second segment have different densities to provide the timpani percussion mallet and shaft

Abstract: A joint clamp for a surgical retractor system includes clamps, a cam bolt, and a cam lever. The cam bolt passes through the clamps. A cam lever comprising a cam head pivotally attached an upper portion the cam bolt to permit rotation between a locked position and an unlocked positions. The joint clamp may include springs which provide a scissors clamp of the clamps with a clip-on feature in which the scissors clamp may clipped-on and clipped-off an object such as a frame member, table post, or retractor handle. The springs may further prevent or reduce a rising movement of the clamps when the cam lever rotates from an unlocked state to a locked state.

Abstract: A trophy apparatus, comprising a plurality of columns; a base piece comprising a plurality of grooves, each configured to attach to a bottom end of each of the plurality of columns, and further comprising an interface configured to couple to a plaque mount; and a lid piece comprising a plurality of grooves, each configured to attach to a top end of each of the plurality of columns.

Abstract: Provided is a drumstick being excellent in durability and enabling a drum performer to achieve a more sensitive performance with vibration transmitted to the drumstick. A drumstick includes: a first rod-like portion, which is made of a synthetic resin, and includes a tip and a shoulder; and a second rod-like portion, which is coupled to the first rod-like portion, and includes a grip, wherein the first rod-like portion has a cavity defined therein so as to extend along an axial direction and over an entire length of the first rod-like portion, and wherein the cavity is open to an outside at an opening portion formed at a distal end of the tip.