Getting to Know Means-Plus-Function Claims: Does 'Means' Always Mean 'Means'?

Means-plus-function claims are a controversial part of claim drafting. On one hand, patent practitioners face the dilemma of whether or not to use such claims in an application, as they may narrow the scope of the patent protection through their dependence on what is described in the specification. On the other hand, such claims may be a complete, simple and elegant way to claim an invention that uses various types of a certain limitation, as in the software field. If a patent practitioner does decide to use means-plus-function claims, he or she should be aware that using the term "means" does not always mean that the claim is a means-plus-function claim. Likewise, the lack of the term "means" does not always mean that a claim is not in means-plus-function form, as exemplified in the recent case law discussed below.

20 minute read May 26, 2005 at 04:35 PM

By

Paul A. Ragusa And Noera Ayaz