 In November, Science of Cambridge was renamed Sinclair Computers Ltd.In March 1981, Sinclair Computers was renamed again as Sinclair Research Ltd and the Sinclair ZX81 was launched at £49.95 in kit form and £69.95 ready-built, by mail order.In February 1982 Timex obtained a licence to manufacture and market Sinclair's computers in the United States under the name Timex Sinclair.