The Antoria guitar brand was managed by JT Coppock Leeds Ltd England.
In September 1972, Hoshino began a partnership with Elger Guitars to import guitars from Japan. On June 28, 1977, in the Philadelphia Federal District Court, a lawsuit was filed by the Norlin Corporation, the parent company of Gibson Guitars, against Elger/Hoshino U. After the lawsuit, Hoshino Gakki abandoned the strategy of copying "classic" electric guitar designs, having already introduced a plethora of original designs.The Ibanez RGA was introduced at a time when the Ibanez RG series only had tremolo bridges.Since then, the RG series has introduced fixed bridge models, but Ibanez still produces the RGA series with an arched top to differentiate from the RG series.The newer Ibanez models began incorporating more modern elements into their design such as radical body shapes, slimmer necks, 2-octave fingerboards, slim pointed headstocks, higher-output electronics, humbucker/single-coil/humbucker (H/S/H) pickup configurations, locking tremolo bridges and different finishes. Custom series are the most exclusive and high-end custom shop guitars Ibanez offers.They are "Envisioned to be the finest Japanese-made guitar in history".