ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,891, issued on Feb. 24, was assigned to BRADY WORLDWIDE INC. (Milwaukee).

"Fluid ejection head having fluid viscosity compensation" was invented by Bruce D. Gibson (Lexington, Ky.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A fluid ejection head that includes a semiconductor substrate containing a plurality of fluid ejectors thereon and a fluid supply via etched therethrough. A flow feature layer is attached to the semiconductor substrate. The flow feature layer has a plurality of fluid channels and fluid chambers for the plurality of fluid ejectors, wherein the fluid channels are configured to provide fluid from the fluid supply via through the ...