Dyson Ltd v Qualtex (UK) Ltd

Unregistered design right under the Copyright, Designs and Patents Act 1988 gives genuine, time-limited protection to original designs, including spare parts. The “must fit” exception removes only features enabling connection or placement so that an article can function; it does not remove features merely because they contribute to functionality or avoid obstruction. The “must match” exception applies where the appearance of a replacement part is sufficiently dependent on the appearance of the larger article that using another design would make that article radically different in appearance. Visual similarity, harmonious design, customer preference and commercial desirability are insufficient by themselves. “Commonplace” concerns the particular design or combination remaining after statutory exclusions, not merely a general concept or isolated features. Mere familiarity, silence or inaction does not establish estoppel without appropriate knowledge, encouragement, reliance and substantial detriment.

Dyson claimed infringement of unregistered design right in numerous vacuum-cleaner spare parts copied and sold by Qualtex, a supplier of pattern parts. The parts included wand handles, hose cuffs, soleplates, cradles, brush bars, stair tools, a tool adaptor and a brush tool.

The dispute concerned originality, the statutory “must fit”, “must match”, surface-decoration and commonplace exclusions, the commencement and duration of design right, and Qualtex’s defences of acquiescence and estoppel. Qualtex admitted copying but argued that the statutory exceptions substantially removed protection for replica spare parts.

1. Construction of the statutory scheme. The court rejected any special pro- or anti-spare-parts approach. The Act was intended to provide real but limited protection for original functional designs, including spare parts. The provisions had to be applied by notionally dissecting the article into relevant features.
2. Must fit. Section 213(3)(b)(i) excludes features which enable an article to be connected to, or placed in, around or against another article so that either can perform its function. The exception is concerned with the connecting or interfacing feature itself. It does not extend to features which merely permit functionality, improve airflow, avoid fouling, support manufacture, or form part of an integrated system. Alternative ways of achieving the connection do not prevent the exception applying.
3. Must match. Section 213(3)(b)(ii) requires dependency of the appearance of the subject article on the appearance of the other article. The court applied a fact-sensitive test asking whether using another design would make the overall article radically different in appearance. A visual link, thematic consistency, similarity, approximate alignment or customer preference is insufficient. The exception did not remove protection from the principal wand handles or the disputed decorative and ribbed features.
4. Surface decoration and commonplace designs. Surface decoration is distinct from the overall shape or configuration. A functional or structural feature is not “mere” surface decoration merely because it also produces an aesthetic effect. Commonplace is narrower than lack of novelty. The relevant comparison concerned the particular design or combination remaining after the other exclusions, assessed objectively in the United Kingdom design field. General concepts, isolated prior examples and familiarity with a successful design did not establish that the designs were commonplace.
5. Commencement and duration. Articles are “made available for sale” when an article made to the design actually exists and is available for sale. Advance orders and non-sale prototypes did not start the period under section 216(1)(b). Section 237 imposed compulsory licensing during the final five years, limiting the availability of injunctive relief during that period.
6. Acquiescence and estoppel. Mere silence or inaction was insufficient. There had to be knowledge at an appropriate corporate level, encouragement or creation of an expectation, reliance and substantial detriment. Qualtex deliberately tested the market while aware that Dyson might object, and could not manufacture an estoppel from Dyson’s failure to sue earlier.
7. Disposition. Qualtex infringed Dyson’s design rights in the copied non-excluded features. Acquiescence and estoppel failed. The court would hear further argument on the appropriate relief.