Re: I won't buy a Dimarzio...
Color trademarks have been invented to prevent competitors to change their sales appearance deliberately so that people who want to buy product A buy product B by accident. That is why most color trademarks are concerned with cardboard boxes, namely the boxes you see on supermarket shelves and in other forms of retail.
That is another reason why this color trademark, on double cream humbuckers, stands very much on it's own. There is very little risk of mistaking a SD for a DiMarzio in Guitar Center even if they were both double cream since both of them come in retail packages that are not double cream colored, not to mention the packages are not on open shelves in the first place. And the majority of DMs pickups is not double cream, they are double black or zerba and others, none of them trademarked, so there's a very weak argument here of SD trying to sneak themselves in trying to pretend they are DiMarzio by offering double cream.
If somebody had the inventive and money to attack this trademark it would fall like a rock. It'll probably only take about a million bucks.