Key legal question
Whether the 3D chair shape had inherent trademark distinctiveness or belonged to the public domain
Extracted holding
The shape is not inherently distinctive for chairs; it remains within the range of common chair forms and is perceived as decoration, not as a source indicator.
Extracted reasoning
Chair designs are highly varied, but the contested form does not depart sufficiently from the market's usual forms to stay in consumers' memory as a sign of one undertaking.