ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,383,387, issued on Aug. 12, was assigned to Water Pik Inc. (Fort Collins, Colo.).

"Oral irrigator" was invented by Harold A. Luettgen (Windsor, Colo.), Oscar Senff (Broomfield, Colo.), Brian Woodard (Fort Collins, Colo.), Blaine Hanson (Fort Collins, Colo.) and Jonathan Huber (Longmont, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An oral irrigator includes a drive assembly, a pump assembly, and a flexible membrane seal. The drive assembly is received within a housing. The pump assembly is positioned at least partially within a pump chamber. The pump assembly includes a piston and a connecting rod coupled to the drive assembly, the connecting ro...