Fox premiered on October 9, 1986, consisting of three squares with the letters "FBC" which stand for the Fox Broadcasting Company.
On late 1987, it introduced a more familiar logo which based on the 20th Century Fox logo and the Fox wordmark was capitalized. It also featured the searchlights and the double pane platform under the name. The logo above used since April 5, 1987 is a print logo based on the 1987 20th Century Fox print logo. Since 1996, this logo has still remained on some affiliate stations such as KTTV.
This logo was introduced on a pre-launch promo on very late 1987.
The current logo was introduced on September 1, 1993. Many different versions (some with and without the 20th Century Fox searchlights) were used over the years as seen below.
1994-presentThe Simpsons merchandise.