"The appellants' submissions are, in essence, based on the
proposition that if a product is worth copying, the law should
protect the product against being copied. My Lords, that is not the
law. In British Leyland Motor Corporation Ltd. v Armstrong Patents
Co. Ltd. (1986) AC 577, this House declined to allow the law of
copyright to be exploited and rejected the argument that a motor car
manufacturer was entitled to a perpetual monopoly in spare parts and
could prevent the copying of spare parts which were no longer
protected by a patent. In In re Coca-Cola Co. (1986) 1 WLR 695,
this House declined to allow trade mark law to be exploited and
rejected the argument that the manufacturer of a beverage sold under
a trade name had established a perpetual monopoly in and could
prevent the copying of the shape of a bottle which was no longer
protected by the Registered Designs Act 1949. In Interlego A.G. v
Tyco Industries Inc. [1988] UKPC 3; (1988) 3 WLR 678, the Privy Council declined to
allow the law of copyright in Hong Kong to be exploited and rejected
the argument that a manufacturer of a toy was entitled to a
perpetual monopoly in the toy and could prevent the copying of the
shape of the toy which was no longer protected by the Registered
Designs Act 1949. In Reg. v Comptroller-General of Patents, Designs
and Trade Marks, Ex parte Gist-Brocades N.V. (1986) 1 WLR 51 and in
Allen and Hanburys Ltd. v Generics (U.K.) Ltd. (1988) 2 All ER
454, proprietors of patented drugs sought to obstruct and delay the
settlement of terms of licences of right by the comptroller and met
with some success until the European Court of Justice ruled that the
comptroller had no power to prohibit imports from Community
countries" (410, 411).