Background
Dr. Jonathan Berall originally sued LMA North America, Inc. for patent infringement regarding a laryngoscope patent. After LMA merged with Teleflex Medical Incorporated, the case was transferred to the Eastern District of North Carolina. Teleflex moved for summary judgment of noninfringement, arguing the accused products did not meet the claim construction of mounted on. The district court granted the motion, and Dr. Berall appealed.
The court’s reasoning
The court reviewed the claim language and specification, noting the distinction between mounted on and mounted in. It concluded that mounted on meant fastened to the exterior of. Regarding literal infringement, the court found the accused device’s camera was fastened to the interior, not the exterior. For the doctrine of equivalents, the court found Dr. Berall failed to provide limitation-specific arguments or particularized testimony required to survive summary judgment. Finally, the court found no abuse of discretion in the venue transfer, as Teleflex had not waived its objection while acting as LMA’s successor-in-interest.
What it means going forward
The ruling reinforces the importance of precise claim language in patent drafting and sets a high bar for doctrine of equivalents arguments at the summary judgment stage. It also clarifies venue waiver rules for corporate successors in patent litigation.