There are five "icke" trademark applications on record with the German Patent and Trademark Office. Three of which were rejected outright. Of the remaining two, one is a combined word/device (i.e., a logo) mark for fashion related goods, and the other is a word mark owned by a meat processing company (goods are not listed in the register, but should be obvious). Since you claim your friend owns a word mark, that must be the meat processing company?
Anyway, for a mark to registered, it is always examined with respect to certain specific goods or services (currently 45 classes according to the Nice Agreement (Nice, as in town-in-France). A mark may be descriptive for some goods/services (and thus be rejected) and distinctive for other goods/services (and thus be allowed).
Maybe he was one that was rejected after he told me about it. I will ask him. But maybe you should know, nothing in German bureaucracy happens “outright”.
There must have been a lengthy process involved with much rubber stamping. LoL!