Off the top of my head I can think of the Trident 3-wheeler made in England in the early 1920, a 1990s American Ferrari Daytona-replica kit car called Trident, based on a Corvette, plus of course the Fiore Tridents of the 1960s-70s, and the revival of the Trident marque with the Iceni in the late 1990s/early 2000s. Wonder what became of that one?!