ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,126, issued on April 14, was assigned to RISO Technologies Corp. (Tokyo).

"Driving device and liquid ejecting apparatus" was invented by Jun Takamura (Mishima Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "According to one embodiment, a driving device for liquid ejection heads includes a control unit configured to apply a multi-droplet waveform to a liquid ejecting element. The multi-droplet waveform is one of a plurality of preset patterns in which each droplet waveform in the multi-droplet waveform is one of a reference ejection waveform or a minute adjustment waveform. The reference ejection waveform causes a droplet of a nominal...