Posts Tagged ‘Guidetech’

Brilliant Instruments v. GuideTech – Doctrine of Equivalents on Review

Thursday, February 21st, 2013

Contributed by Theresa Stadheim of Schwegman Lundberg & Woessner

In Brilliant Instruments, Inc., v. Guidetech, LLC, Appeal no. 2012-1018 (Fed. Cir. February 20, 2013) (a copy can be found at the end of this post), a panel of the Federal Circuit reversed and remanded the Northern District of California’s summary judgment that Brilliant Instruments, Inc. (“Brilliant”) did not infringe GuideTech’s patents: 6,226,231 (the ’231 patent), 6,091,671 (the ’671 patent) and 6,181,649 (the ’649 patent). (A copy of each patent can be found at the end of this post.)

One issue was whether there was a genuine issue of material fact as to whether Brilliant infringed the ’671 and the ’649 patents under the doctrine of equivalents.  The particular claim limitation at issue recited in claim 1 of the ’671  patent: “wherein said shunt and said capacitor are operatively disposed in parallel with respect to said first current circuit.”

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