House marks do not identify the goods - rather, they identify the manufacturer or seller over a wide variety of goods, with such goods often themselves identified by a "product mark". Marks of this type are often used in the chemical, pharmaceutical, publishing, and food industries. A product may bear both a product mark and a house mark. For example, a pharmaceutical manufacturer, XYZ Laboratories Corp., may sell a particular pharmaceutical preparation for a cough syrup under the product mark "FORMULA M" and also feature the house mark "XYZ LABS" on the packaging for the goods. XYZ may also use the same house mark on the packaging of its other pharmaceutical preparations to indicate that all such goods come from a common source