Christopher Beauchamp

On the face of it, patents seem like one of the best sources for learning about invention. Patent specifications must precisely detail an inventor’s contributions to the art. Patent disputes, especially those that end up in court, generate an intensive fact-finding process about who conceived what and when. In some cases, the courts appear to deliver a ‘definitive’ ruling on the originality, priority and scope of important inventions. Useful, right?

Well, only up to a point. Historians of technology who work with patents (hopefully) tend to develop a more nuanced view of how these documents are produced and adjudicated. In almost every instance, patent specifications represent strategic choices about how to present particular subject-matter and how to gain maximum protection for the inventor’s rights. Patent litigation and its outcomes are an even more complex amalgam of legal tactics, resources and skill. The central problem for the historian of a particular technology, or of aggregate technical change, is the fact that patents—ultimately units of property, rather than units of invention—are legal phenomena first and foremost.

This suggests the importance of developing a more systematic, cross-sectional view of the legal practices and institutions that shaped patents. The proposed paper addresses one hitherto particularly opaque area: the process of litigation. In particular, it considers late-nineteenth-century American patent suits as a ‘social litigation system’. Coined by the legal historian Edward Purcell, the term refers to a class of lawsuits sharing a common set of legal rules, comparable disputes and professional repeat players. Within such a system, factors such as professional networks, long-term strategies and legal resources (influences that are largely invisible to the student of a single patent controversy) had substantial effects on case outcomes.

The paper’s contribution is methodological as well as substantive. Previous historical treatments of nineteenth-century patent suits rely on reported cases. This research, by contrast, uses court archives to analyse the actual population of lawsuits. As well as avoiding the sample-bias problems associated with case reporting, this approach yields rich information on the parties, legal practitioners, and patents involved in litigation.