ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,131, issued on June 24.
"Variable frequency waveform tattoo needle mechanism" was invented by Carson F Hill (Thousand Oaks, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotary tattoo machine includes an inner housing; a tattoo needle; an electric motor including a shaft assembly; and a bearing arm including a bearing. The machine also includes a cam, the cam moving up and down the shaft assembly due to the rotation of the shaft assembly and the bearing, the moving of the cam to drive the tattoo needle from a retracted position to an extended position. The device my also include an outer housing or grip. The dimensions of or a shape of the...