ALEXANDRIA, Va., July 7 -- United States Patent no. 12,674,697, issued on July 7, was assigned to Luneta LLC (Tulsa, Okla.).

"Machine fluid condition monitoring system" was invented by James Chester Fitch (Tulsa, Okla.), Thomas Chester Fitch (Tulsa, Okla.), James Bennett Fitch (Tulsa, Okla.) and Jeremy J. Wright (Glenpool, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sight glass column is described. The sight glass column is configured to be indirectly attachable to a machine via a machine connector such that machine fluid is transferable from the machine to the sight glass column. The sight glass column further has a remote sensing port, and a lockable oil level ring."

The patent was filed on Dec...