Although the range of injury-causing products is extensive, defective product liability lawsuits can generally be grouped into three categories. The first category involves products that have been defectively manufactured in some way, meaning that a mistake was made either at the factory or at some point between the factory and wherever the product was purchased, resulting in a faulty product.
The second category of claims involves products that have been defectively designed, meaning that the product is dangerous in some way even though it was correctly manufactured. These cases do not involve a single faulty product, but rather an entire line of products that are claimed to be unreasonably dangerous.
The third category of claims involves a failure to provide adequate warnings or instructions regarding the proper use of the injury-causing product. These claims are sometimes referred to as "defective marketing" claims. To learn more, read Nolo's article Types of Defective Product Liability Claims.