ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,715,215, issued on Aug. 25, was assigned to CANON K.K. (Tokyo).

"Manufacturing method of liquid ejection head and liquid ejection head" was invented by Tomoki Morikawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a method for manufacturing a liquid ejection head having an ejection unit including an element substrate provided with ejection ports to eject liquid, and a support member to support the ejection unit with a support surface and provided with a liquid supply path, the method includes arranging and curing. A first adhesive is arranged to surround the supply path and a second adhesive is arranged in each of at least three of four areas...