This was an appeal from the Court of the Commissioner of Patents. The Appellant had filed a patent application in1987 in respect of an invention, consisting of a lavatory plumbing arrangement and a two­way valve means. In1989, the Appellant made certain amendments to the 1987 patent and successfully filed a patent application in respect of the amended invention. The amendments were set aside by the Commissioner in 1992 because they had not been sought and effected as prescribed by section 51(1) of the Patents Act, No 57 of 1978. The 1987 patent thus reverted to its original state. The appeal was accordingly dismissed with costs.