The Appellant ("Dexion") was the owner of the copyright in four technical drawings relating to a Speedlock racking system. The Respondent ("Universal") produced the Speedlock system in terms of a sub­licence from Dexion's licensee ("Brazier"). When Universal was unable to obtain a direct license from Dexion, it produced its own racking system: "Unirack". Dexion maintained that the Unirack design was a copy of its Speedlock system and that universal infringed the copyright it held over Speedlock. Goldblatt J, in the court a quo found in favor of Universal. Dexion appealed against that finding