Beecham Group Ltd v Bristol-Myers Company - [1981] 1 NZLR 600

Patents — Opposition proceedings — Appeal — Beecham applied for letters patent for the penicillin "Amoxycillin" — Bristol opposed application on the grounds of prior publication and obviousness — Whether there was a prima facie case justifying the issue of a patent — Whether the claim clearly did not involve any inventive step — Whether Beecham was entitled to a patent carrying a monopoly of the compound in all commercial forms — Patents Act 1953, ss 10 and 21.