In the late 1970s, many US radio stations began calling themselves "Kiss". Among these was KIIS-FM in Los Angeles, which adopted that call sign in 1975 when it became a sister station to KIIS (AM) — whose call sign comes not from the word "Kiss" but rather its dial position at 1150, with the letters "I" and "S" being the letters most closely resembling 1 and 5, respectively. Gannett, which owned the station, filed a federal trademark registration for "KIIS" in 1986, which has passed on to subsequent owners of the station. In 1997, Country Club Communications registered the only current federal trademark for "KISS FM" (which has since also been assigned to iHeartMedia); the logo registered then included a stylized pair of lips.