ALEXANDRIA, Va., July 9 -- United States Patent no. 12,355,553, issued on July 8, was assigned to Rockwell Automation Technologies Inc. (Mayfield Heights, Ohio).

"Diagnostic system and method for network synchronized time in safety applications" was invented by Yanbin Zhang (Shanghai), Xiaobo Peng (Shanghai), Sikai Zhang (Shanghai), Steven T. Seidlitz (Eagle, Wis.) and Arun K. Guru (Brookfield, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "To improve integrity of time synchronization, a node in a safety rated system verifies that its clock remains synchronized to another clock. Two adjacent, time-synchronized nodes transmit diagnostic messages to each other at an agreed upon interval and generate times...