The U.S. Court of Appeals upheld two district court judgments for Apple, confirming WARF's abandonment of its doctrine-of-equivalents theory in the '752 patent case.
WARF relinquished its doctrine-of-equivalents theory pre-trial to secure Apple's agreement not to use its patent during litigation, highlighting the strategic legal maneuvers involved.
This ruling reinforces the importance of clear agreements and the potential repercussions of abandoning legal theories, as seen in the decade-long dispute between WARF and Apple.
Despite initial claims of both literal infringement and doctrine-of-equivalents, Apple successfully argued against the latter, showcasing the complexities of patent law interpretation.
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