The outcome of a trade mark case between supermarket giant Tesco and discount retailer Lidl has taken IP lawyers by surprise. Lidl, whose logo consists of a yellow circle outlined in red over a blue ...

The Game of Red, Yellow, and Blue Hervé Tullet. Phaidon, $9.95 (14p) ISBN 978-0-7148-6481-5 ...

Britain's biggest retailer Tesco on Tuesday lost an appeal against a ruling that it infringed German discount supermarket Lidl's trademark over the use of a yellow circle on a square blue background.