IP Law Daily, PATENT—Fed. Cir.: Data transfer innovator's infringement lawsuit against consumer electronics and fitness giants properly dismissed, (Nov 1, 2024)

By Saurabh Kashyap, B.A., LL.B., LL.M.

District court correctly found that plaintiff failed to provide sufficient evidence demonstrating the accused products met the essential requirements of the asserted patents.

The U.S. Court of Appeals for the Federal Circuit affirmed a federal district court’s patent noninfringement summary judgment favoring a group of consumer electronics and fitness companies, including Fitbit, Nike, Under Armour, Fossil, Misfit, Nikon, and Garmin. Finding no triable issue of material fact, the appellate court ruled that the plaintiff, Cellspin Soft Inc., failed to provide sufficient evidence to demonstrate that the accused products included critical features described in its asserted patents (Cellspin Soft Inc. v. Fitbit LLC, Nos. 22-2025, 22-2028, 22-2029, 22-2030, 22-2032, 22-2037 (Fed. Cir. Nov. 1, 2024)).

Background. The plaintiff, Cellspin, is a technology company specializing in innovations for multimedia data capture and transfer through mobile devices. Fitbit, Nike, Under Armour, Fossil, Nikon, and Garmin are prominent consumer electronics and wearable technology companies, each producing products that connect users to digital experiences, such as fitness and lifestyle tracking.

In this lawsuit, Cellspin asserted its U.S. Patent Nos. 8,738,794 (the ’794 patent), 8,892,752 (the ’752 patent), and 9,749,847 (the ’847 patent). Each of these patents addresses a system designed to simplify capturing and uploading multimedia data from one device to another using Bluetooth technology. The ’794 patent covers methods for establishing a paired Bluetooth connection between devices and managing data acquisition and transfer. The ’752 patent includes additional requirements for data encryption and user identification, while the ’847 patent describes a system configuration with a Bluetooth-enabled data capture device and a processor to acquire, store, and transfer data while performing specified functions. Essential elements in the patents required a “user identifier” to be added by the mobile device, a “continuous Bluetooth connection” between devices, and a “first processor” in the data capture device to perform data-related functions.

In 2017, Cellspin filed this lawsuit alleging that the defendants’ wearable devices, such as fitness trackers, infringed on its Bluetooth-enabled multimedia data transfer patents. Cellspin claimed that these products unlawfully used its patented technology, which automates capturing and uploading multimedia content from a data-capturing device to a mobile device and then to the internet.

In 2018, the district court dismissed the case, holding that Cellspin's patents claimed ineligible subject matter under 35 U.S.C. § 101, describing abstract ideas without adequate technical detail. Cellspin appealed this ruling, and in 2019, the Federal Circuit reversed the dismissal, instructing the district court to re-examine the patents' technological aspects. After remand, the district court conducted claim construction proceedings to clarify key terms in the patents. It concluded that to meet the patents’ claims, the data capture device in accused products must be separate from the mobile device and that a “paired connection” must remain continuous.

After this claim construction, the defendants moved for summary judgment, asserting their products did not meet the patent requirements. They argued that the products lacked a “user identifier” attached to the mobile device, a continuous Bluetooth connection, and a processor performing all the specified functions. The district court agreed, finding that Cellspin had not shown that the accused products incorporated these technical elements, and granted summary judgment in favor of the defendants in June 2022. Cellspin appealed again.

User identifier requirement. For Fitbit, Fossil, and Garmin, the district court’s summary judgment rested on the inability of Cellspin’s evidence to prove that the defendants’ products contained a “user identifier” or “user information” as required by the asserted patents’ claims. Cellspin had identified “OAuth” as the claimed user identifier but had failed to disclose this in its initial infringement contentions.

According to local rules, Cellspin was required to specify where each claim element was found within each accused product early in the litigation. The district court ruled that Cellspin’s late assertion of OAuth was inadmissible, consistent with Patent Local Rule 3-1(c), which mandates an early and clear articulation of infringement contentions.

The Federal Circuit agreed with this procedural determination, reinforcing that procedural diligence is required in patent cases. Referencing SanDisk Corp. v. Memorex Products, Inc., 415 F.3d 1278, 1292 (Fed. Cir. 2005), the appellate court emphasized the importance of adhering to procedural requirements to substantiate claims in infringement suits.

Application of user identifier by mobile device. In Nike's case, the court examined whether the “user identifier” required by Cellspin's patents was added by the mobile device, as specified in the patent claims. Nike's product, the Apple Watch, does add an identifier to user data, but Cellspin's evidence showed that this identifier was added by the watch itself (the data capture device), not by a separate mobile device, as the patents required. The Federal Circuit agreed with the district court's conclusion that Cellspin had not shown enough evidence to dispute this point.

First processor limitation. The ’847 patent requires a “first processor” within the device to perform data acquisition, storage, and notification functions. Cellspin argued that Nike’s product met this criterion, but the district court found the evidence insufficient. Cellspin’s expert testimony failed to establish that any single processor in the Nike product met all claim-specified functions. Citing Anderson v. Liberty Lobby, Inc., 477 U.S. 242, 255 (1986), the court underscored that mere assertions without concrete evidence are inadequate for avoiding summary judgment. Consequently, the Federal Circuit upheld the noninfringement judgment on these grounds.

Continuous paired connection. For Nikon and Under Armour, the critical issue was whether the devices maintained a continuous Bluetooth connection, as the patents specify. The court's construction of a “paired connection” required an uninterrupted connection, a stipulation that Cellspin did not contest on appeal. Nikon's product employed a two-step process, where the connection was temporarily severed, and Under Armour’s device utilized Bluetooth Low Energy, activating briefly and disconnecting intermittently to save power. These configurations did not meet the requirement of a continuous connection. Citing Nystrom v. TREX Co., Inc., 339 F.3d 1347, 1351 (Fed. Cir. 2003), the Federal Circuit emphasized adherence to patent claim terms as construed by the court. This analysis reinforced the district court’s ruling that neither Nikon’s nor Under Armour’s products satisfied the continuous connection requirement.

The Cases are Nos. 22-2025, 22-2028, 22-2029, 22-2030, 22-2032, 22-2037.

Judge: Taranto, R.

Attorneys: Michael Scott Fuller (Garteiser Honea, PLLC) for Cellspin Soft, Inc. Karim Zeddam Oussayef (Desmarais LLP) for Fitbit LLC, Fossil Group, Inc., Garmin International, Inc., Garmin USA, Inc., Misfit, Inc., and Nike, Inc. Seth W. Lloyd (Morrison & Foerster LLP) for Nikon Americas, Inc., Nikon Inc., Under Armour, Inc., Nikon Americas, Inc., and Nikon Inc. Stanley J. Panikowski, III (DLA Piper LLP [US] for Nike, Inc. David Utykanski (Harness, Dickey & Pierce, PLC) for Under Armour, Inc. Richard Bonilla (Fish & Richardson P.C.) for Fossil Group, Inc., and Misfit, Inc. Rachael D. Lamken (Baker Botts LLP) for Garmin International, Inc., and Garmin USA, Inc.

Companies: Cellspin Soft, Inc.; Fitbit LLC; Fossil Group, Inc.; Garmin International, Inc.; Garmin USA, Inc.; Misfit, Inc.; Nike, Inc.; Nikon Americas, Inc.; Nikon Inc.; Under Armour, Inc.; Nikon Americas, Inc.; Nikon Inc.

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