Question mark
The rhetorical question mark or percontation point was invented by Henry Denham in the 1580s and was used at the end of a rhetorical question; however, its use died out in the 17th century. It was later revived in modern-day society by Matt DiRoberto. It was the reverse of an ordinary question mark, so that instead of the main opening pointing back into the sentence, it opened away from it. This character can be represented using the reversed question mark (⸮) found in Unicode as U+2E2E. The percontation point is analogous to the irony mark, but those are even more rarely seen.
House mark
The Norwegian word "bomerke" or "boemerke" probably came from Denmark. There is no Norwegian reference before the 17th century. Today "bomerke" is mainly written as "bumerke" in Norwegian. Both in Denmark and Sweden, the word bomerke (with multiple spellings) is used since the 14th century and in the 16th century. In the Icelandic codes of law from the Middle Ages, one finds the word "einkunn" used to denote owner marks used to tag animals. It is likely that this word has also been used in Norway.