Kinoshita died Dec. 9 at an assisted living center in Torrance, said Mike Clark, a family friend. He was 100.
"Lost in Space," which ran from 1965 to 1968, is about the Robinson family's extraterrestrial adventures. A 1998 film based on the series starred William Hurt, Mimi Rogers and Gary Oldman.
The "Lost in Space" robot -- which has become a pop-culture icon -- was similar in look to a robot named Robby that Kinoshita helped create for the classic 1956 sci-fi movie "Forbidden Planet." Robby showed up in several productions after that, including an episode of "Lost in Space."
Kinoshita also worked as an art director or set designer on shows including "Sea Hunt" and "Bat Masterson."