Quantum Corp. v. Rodime, PLC
United States Court of Appeals for the Federal Circuit
65 F.3d 1577 (1995)
- Written by Eric Miller, JD
Facts
Rodime, PLC (defendant) held a patent on computer hard-disk drives. Rodime requested reexamination of the patent. The request was granted by the United States Patent and Trademark Office (PTO). During the reexamination process, patent claims referring to a minimum storage capacity of at least 600 concentric tracks per inch (tpi) were amended by Rodime to add the word “approximately,” which had been present in the original application. The reexamined patent issued. Quantum Corporation (plaintiff) then brought an action for a declaratory judgment of invalidity of Rodime’s patent on the ground that the amendments impermissibly broadened the scope of the claims. The federal district court granted summary judgment in favor of Quantum. Rodime appealed to the United States Court of Appeals for the Federal Circuit, arguing that the word “approximately” was merely an explicit statement of something already implied in the claims.
Rule of Law
Issue
Holding and Reasoning (Plager, J.)
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