Patently Strategic Podcast: Means-Plus-Function and the Risk of Losing Your Way

Inventors and practitioners alike are continually trying to push the bounds of protection on innovations. Whether it’s describing a telegraph as a means for communication or a lightbulb as a means for lighting an environment, using broad language, like “means for” language, to cover all the possible workarounds might seem more advantageous than disadvantageous, at first glance. In patent law, this broad language or “means for” phraseology is called functional language because it describes the device or system in terms of what it accomplishes rather than the actual structure. However, using functional language has lost favor over time. For example, a blog published by Patently-O in 2011 shows that the use of “means for” language has dropped precipitously from about 1990 to present day. What has turned this seemingly advantageous practice into a disadvantageous one?In this episode of Patently Strategic, the panel walks through several court cases that either: invalidated a patent for failing to define structures in the specification for the all the means-plus-function claim terms or maintained validity of the patent because the specification provided sufficient structure for all the means-plus-function claim terms.Read More