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Keywords

appealsummary judgmentwillpatent

summary judgmentpatent

Related Cases

Digital Biometrics, Inc. v. Identix, Inc., 149 F.3d 1335, 47 U.S.P.Q.2d 1418

Facts

Digital Biometrics, Inc. (DBI) brought a patent infringement suit against Identix and its president, Randall Fowler, regarding U.S. Patent No. 4,933,976, which pertains to a system for capturing, storing, and displaying fingerprint images. The district court granted summary judgment in favor of Identix, ruling that the accused devices did not infringe the patent either literally or under the doctrine of equivalents. DBI appealed the decision, asserting that the court erred in its interpretation of key terms in the patent claims.

The present suit involves U.S. Pat. No. 4,933,976 (the '976 patent), entitled 'System for Generating Rolled Fingerprint Images.' As the title implies, the patented invention relates to a system (and method) for capturing, storing, and displaying fingerprint images.

Issue

Did the district court err in granting summary judgment of non-infringement regarding the patent for a system and method of capturing, storing, and displaying fingerprint images?

Rule

The court must construe patent claims as a matter of law, focusing on intrinsic evidence such as the claims, written description, and prosecution history. If the intrinsic evidence is clear, extrinsic evidence is unnecessary. The applicant must distinctly claim the subject matter of the invention, and if a claim can be interpreted in both broader and narrower terms, the narrower interpretation supported by intrinsic evidence will be adopted.

Courts have the power and obligation to construe as a matter of law the meaning of language used in patent claims.

Analysis

The court analyzed the terms 'array' and 'slice data' as used in the patent. It concluded that 'array' referred to a data structure stored in memory that represented a two-dimensional image, while 'slice data' referred to data within an 'active area' of the fingerprint image. The accused devices did not meet these definitions, as they generated analog data and did not store the required data structures. Therefore, the court found no literal infringement and also ruled out infringement under the doctrine of equivalents due to significant differences in the data generated by the accused devices.

The touchstone for determining whether an element in an accused device is equivalent to a claimed limitation is the substantiality of their differences; in order to infringe under the doctrine of equivalents, the element must differ only insubstantially from the asserted claim limitation.

Conclusion

The Court of Appeals affirmed the district court's summary judgment of non-infringement, concluding that the accused devices did not infringe the patent either literally or under the doctrine of equivalents.

Affirmed.

Who won?

Identix prevailed in the case as the court found that the accused devices did not infringe the patent held by DBI. The court's reasoning was based on the interpretation of key terms in the patent claims, which were found not to be satisfied by the devices in question. The court emphasized that even a single limitation not being met precludes a finding of infringement, leading to the conclusion that Identix's devices operated outside the scope of the claimed invention.

Identix prevailed in the case as the court found that the accused devices did not infringe the patent held by DBI.

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