ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,383,665, issued on Aug. 12, was assigned to Johnson & Johnson Surgical Vision Inc. (Irvine, Calif.).

"Systems and methods for proportional pressure and vacuum control in surgical system" was invented by Nader Nazarifar (Laguna Niguel, Calif.), Deep Mehta (Irvine, Calif.) and Lauren Hickey (Los Angeles).

According to the abstract* released by the U.S. Patent & Trademark Office: "A pneumatic cross-connect proportional valve provides the capability to calibrate pressure and vacuum sensors in a surgical cassette associated with a surgical console. Calibration of non-invasive pressure and vacuum sensors in a cassette by utilizing a proportional cross-connect to pressurize the lines with s...