ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,455,227, issued on Oct. 28, was assigned to International Business Machines Corp. (Armonk, N.Y.).

"Enclosed, multi-chamber metering and mixing system used for urinalysis" was invented by Vince Siu (Ontario, Canada), Bing Dang (Chappaqua, N.Y.), Bo Wen (New York) and Kuan Yu Hsieh (Changhua, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid metering and mixing system for preparing a plurality of samples for analysis. The system includes: a liquid metering apparatus disposed in fluid communication with a sample holder and a plurality of reaction chambers and configured to meter a volume of a liquid into each of the plurality of reaction chamb...