The penner and inkhorn is considered a single charge: a cylindrical container for pens, connected by cords to an ink bottle. It’s found in the armory borne by the Worshipful Company of Scriveners, 1530 (though not confirmed until 1634) [Bromley & Child 217]. For related charges, see penbox.
The College of Scribes of Caid bears: A penner and inkhorn argent.
Salomea Imhof bears: Purpure, three penners and inkhorns argent.
Samthann ingen Garbáin bears: Argent, three penners and inkhorns azure.