The Respondent (Plaintiff in the court a quo) brought two actions against the Appellants (Defendants in the court a quo) for the alleged infringement of a patent in respect of an invention relating to plastic tubes. The court a quo found in favor of the Respondent. The instant case is an appeal against this decision. Held ­ The onus of proof on the issue of infringement of patent fell to the Respondent and on the issue of invalidity onus fell to the Appellants. The Court disagreed with the finding of the court a quo and accordingly the appeal was upheld with costs.