Studio Nue
Kazutaka Miyatake of Studio Nue originally designed the mobile infantry powered armors in the OVA for a Japanese edition of the novel (published by Hayakawa Publishing, Japan's largest science fiction publisher) in the early eighties. A mecha based on this design also appears on the "DAICON III" and "IV Opening Animations" from 1981 and 1983, a few years before the OVA was released.