ALEXANDRIA, Va., March 31 -- United States Patent no. 12,592,814, issued on March 31.

"Maintaining a virtual time of day" was invented by Vivek Sarda (Austin, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "Time of day (ToD) registers provide respective virtual ToDs corresponding to the occurrence of edges of input clock signals being supplied to an integrated circuit. The integrated circuit generates a heartbeat clock signal having a frequency higher than a SYNC signal and time stamps the heartbeat clock signal to generate heartbeat time stamps. The heartbeat time stamps are used along with the time stamps of the input clock signals to determine the time of day corresponding to occurrences of edges of ...