ALEXANDRIA, Va., May 19 -- United States Patent no. 12,629,285, issued on May 19, was assigned to Strand Industries LLC (Woodland Hills, Calif.).
"Glow in the dark earplugs" was invented by Ryan Parry (Los Angeles).
According to the abstract* released by the U.S. Patent & Trademark Office: "An earplug includes a body made of a silicone material containing a phosphorescent material that causes the earplug to glow in the dark after exposure to light. A filter for reducing sound is positioned within the body. The silicone material includes 80-90% polydimethylsiloxane and 5-15% of the phosphorescent material, such as zinc sulfide, strontium aluminate, or rare-earth metal chelates. A fin extends from the body and fits into folds of an outer ea...