Toy company MGA Entertainment has preemptively sued Louis Vuitton in an attempt to prevent the fashion house from taking actions that might impact sales of its slime-filled children's purse Pooey Puitton. More
Representatives of rock band Nirvana are suing Marc Jacobs for using its copyrighted smiley face logo in the fashion designer's latest collection and campaign. More
French fashion house Balenciaga is being sued for creating key rings that closely resemble Little Trees, the popular in-car air fresheners. More
Nestlé has lost a long-running legal battle to win the European copyright for the four-fingered design of its KitKat chocolate bar. More
Levi's has accused French fashion brand Kenzo of copying the famous red tabs of its jeans. More
The controversial Dubai Frame has opened to the public, despite an ongoing copyright dispute with architect Fernando Donis, who won a competition to design the observation tower over a decade ago. More
Toblerone diluted its trade mark when it released a savings-driven redesign of its chocolate bar last year, retail chain Poundland is set to argue in the UK courts. More
Architects shouldn't be stifled by their disdain for copying successful ideas, from Assemble's pop-up cinema to Shigeru Ban's cardboard structures, says Phineas Harper in his latest Opinion column. More
Confectionary giant Mondelez and British chain Poundland are locked in a feud over the discount store's new Toblerone-esque chocolate bar called Twin Peaks. More
The blue and white sari famously worn by recently canonised nun Mother Teresa has been trademarked to protect her reputation. More
The organisers of Swiss fair Art Basel have filed a lawsuit against Adidas for using the event's name and branding without permission on a limited-edition pair of trainers. More
Nestlé has lost a four-year battle to get the design of its KitKat chocolate bar recognised as a trade mark in the UK. More
The Italian courts have sided with Molteni&C in a legal dispute against Cassina that saw both brands exhibit the same chair during Milan design week. More
Molteni&C has won the first round of a legal battle against Cassina, after both Italian brands showed the same 1950s Gio Ponti chair at Milan design week. More
Copyright protection lasts too long and should be shortened, according to musician David Byrne, speaking at a design festival at the new A/D/O space in New York this weekend. More
The US Supreme Court has ruled in favour of Samsung in its ongoing patent case against fellow tech giant Apple. More
German brand e15 is taking IKEA to Germany's highest court over a bed it claims is copied from one of its own designs. More
Recent changes to UK copyright law might not give furniture designers the protections they expect, according to intellectual property lawyer Margaret Briffa. More
New copyright laws in the UK have come into effect, banning replicas of some of the most-copied icons of 20th century furniture design – including pieces by Arne Jacobsen, and Charles and Ray Eames (+ slideshow). More
Business news: American furniture brand Emeco has accepted an out-of-court settlement from IKEA after accusing the Swedish giant of copying the design of one of its chairs. More