Here's another tidbit of info. Bruce Lee moved to LA/CA in December of 1966. By 1967 he had established a JunFan Gung Fu club as a training center. Jeet Kune Do was not formalized until 1968. Bruce closed his school and disbanned the teaching of JKD in 1971. Original JKD identifies not the junfan gung fu but the JKD as taught by Bruce from 1968-1971, about two years.
Bruce continued to teach his personal training methods and philosophy ( based on the philosopher Krisnamurti) until 1973. The "philosophy" of JKD may be what Dan Inosanto has labeled as the JKD concept. But he has never offered this comment. Instead the term "Jun Fan jeet kune do" has been introduced after Lee's death to include Junfan Fan gung fu and the Original JKD (68-71). The whole thing has been confusing and the source of many heated debates.