Loosely defined (and coming into more popular use on sites such as e Bay and Craigslist) a "lawsuit" guitar is ANY old guitar made outside of the USA that is a copy of a popular US-made guitar.
In this sense, any MIJ (or made in Korea, China, wherever) guitar that looks like a Fender strat or tele; or a Gibson Les Paul, SG, ES-335; or a Martin acoustic; or a Guild or Rickenbakker; can be labeled as a "lawsuit" model.
Thus, the only true "lawsuit" guitars out there for sale are Ibanez-branded electric guitars that are copies of Gibson models and made with "open book" headstocks.
That covers a range of approximately 1970 through 1976, when the headstock switch came about.
Fujigen is known to have produced guitars with these brands during the 1970s: And, there are obviously many more.