Comparing claim to accused process (Autogiro)
a.    Literal Infringement: Construe claim then ask is every element and every limitation on every element in accused device.
b.    Doctrine of Equivalents: May broaden patentee’s right to exclude somewhat beyond the literal language. thus, courts may broaden and narrow patent rights to give the patentee something different than what is literally claimed. Courts cannot, however, broaden or narrow the actual claims.
c.    Specification: Courts refer to it do define words and phrases used in claims, but limitations may not be “read into” the claims from the specification. Fuzzy line, see Unique Concepts
d.    Reverse Doctrine of Equivalents