Wiktionary
proprietarily
adv. In a proprietary way.
Usage examples of "proprietarily".
The little queen appeared, one front talon resting proprietarily on the egg, and then she leaned forward, towards Menolly's face, so dose that the fantastic motion of the many-faceted eyes were clearly visible.
She smiled proprietarily as she realized that her queen was nearly as big as some of the fully-grown smaller green dragons.