US Patent 7296944 Marking instruments and methods of manufacturing marking instruments

A handheld marking instrument includes a body having a substantially flat shape, a first chamber formed within the body and having an inner surface configured to receive and contain a marking substance within the body, and a first marking device configured to deliver the marking substance to a desired surface during marking. The first marking device is incorporated in the body and in communication with the first chamber to access the marking substance contained by the inner surface. At least a part of the first marking device is moveable between an exposed position for marking on the desired surface, and a retracted position. In one embodiment, the body has a form factor of a financial transaction card.