Yes.. even though none were imported into the states, I believe a small number of Triumphs were built under contract each year between 1983 and 1991 just to keep the name alive. They were not experimental models, just a continuation of the 1983 model. I personally have not seen a Triumph built past 1983, but this is what I have read anyways.
Triumph did have a four cylinder "Trident".. (Quadrent?.. lol) about ready to go into production. They also had there own version of the 8 valve (4 valve per cylinder) Bonneville ready to go, but they went under before these could be brought into produciotn. Both of these were still push-rod models to the best of my knowledge and still would have been light years behind the venerable Honda CB750.