ALEXANDRIA, Va., June 16 -- United States Patent no. 12,306,558, issued on May 20, was assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY LP (Spring, Texas).
"Mixing printing fluid" was invented by Ziv Seemann (Ness Ziona, Israel), Yinon Harari (Ness Ziona, Israel), Alexander Yekymov (Ness Ziona, Israel) and Shmuel Borenstain (Ness Ziona, Israel).
According to the abstract* released by the U.S. Patent & Trademark Office: "An example printing fluid apparatus, for a printing system, comprises a printing fluid reservoir to store printing fluid for use in a print job and a printing fluid channel to route printing fluid from the reservoir to the reservoir and to route printing fluid from a printing station of the printing system to the reservoir....