And, this isn't the first time DB's gone this route. The ODT reports:
It also bid, unsuccessfully, to trademark its Summer Ale in 2007 to stop Lion Breweries selling Mac's Sun Dance Summer Ale and at the same time tried to stop Galbraith Brewery in Auckland from selling a summer ale it had been making for 12 years.Trademarks make sense as a way of preventing folks from eroding a firm's reputation. DB would rightfully get upset if another brewery tried to produce a "Monteith's" beer. But summer ales and radlers are fairly common styles. DB here seems to be trying to use IP law instead to raise its rivals' costs. It is no more likely that a drinker would confuse a Monteith's Summer Ale with Mac's Summer Ale than that they'd confuse a Monteith's Pilsner with anyone else's.
Lion produces a radler style under its Barefoot label in Australia but does not sell it here. It does not believe anyone should have exclusive use of the name of widespread beer styles.
So now Green Man puts a sticker saying "Cyclist" over the "Radler" name on the label.