Revell and Italeri have both created ships in 1/720th scale since the mid-1960's. Since then, Revell has released several of the Italeri USN carriers in 1/720 as well. There are some ships in the Revell catalog not manufactured by Italeri, such as the Admiral Hipper class cruisers, and some modeled by Italeri and not by Revell, such as the pocket battleships. The 1/720 scale predates the 1/700 offerings by the Japanese consortium by about 10 years, if memory serves.
Bill