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Federal Circuit IP Blog

Software Claims Lacking an Algorithm Are Held Indefinite for Lack of Sufficient Structure

March 8, 2021

By Shannon M. Patrick

Edited by Kara A. Specht; Elizabeth D. Ferrill

In Rain Computing, Inc. v. Samsung Electronics Co., Ltd., the Federal Circuit reversed the district court’s determination that “user identification module” was not indefinite.

The Federal Circuit first analyzed whether “user identification module” is a means-plus-function term. For terms not including “means for” language, the term will only be construed as means-plus-function if it recites a function without sufficient structure for performing the function. The Federal Circuit found the term was a means-plus-function term because Rain failed to identify claim language that provided the structure for performing the claimed function and that the term itself “merely describe[ed] the function of the module: to identify a user.” Slip op. at 5.

The analysis next turned to identifying the function and corresponding structure in the specification, consistent with procedures for construing means-plus-function terms. Under relevant precedent, “[w]here a general-purpose computer is the corresponding structure and it is not capable of performing the controlling access function absent specialized software,” the patent must disclose an algorithm for performing the claimed function. Id. at 9. Because no algorithm could be found, the Federal Circuit held that the term “user identification module” lacked sufficient structure, rendering the claims indefinite.

Tags

claim construction, means-plus-function claim, United States Court of Appeals for the Federal Circuit (CAFC)

For more information

  • Rain Computing, Inc. v. Samsung Electronics America, Inc.

Related Practices

Patent Litigation

Appeals

Related Industries

Electronics and Information Technology

Electrical and Computer Technology

Contacts

Shannon M. Patrick
Associate
Atlanta, GA
+1 404 653 6558
Email
Kara_Specht
Kara A. Specht
Associate
Atlanta, GA
+1 404 653 6481
Email
Elizabeth_Ferrill
Elizabeth D. Ferrill
Partner
Washington, D.C.
+1 202 408 4445
Email

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