Cisco Sys., Inc. v. Uniloc United States, Inc.

386 F. Supp. 3d 1185
CourtDistrict Court, N.D. California
DecidedMay 6, 2019
DocketCase No. 18-cv-04991-SI
StatusPublished
Cited by1 cases

This text of 386 F. Supp. 3d 1185 (Cisco Sys., Inc. v. Uniloc United States, Inc.) is published on Counsel Stack Legal Research, covering District Court, N.D. California primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Cisco Sys., Inc. v. Uniloc United States, Inc., 386 F. Supp. 3d 1185 (N.D. Cal. 2019).

Opinion

SUSAN ILLSTON, United States District Judge

Now before the Court is plaintiff/counter-defendant's motion for judgment on the pleadings, which seeks a finding that U.S. Patent No. 6,980,522 is patent-ineligible under 35 U.S.C. § 101. Dkt. No. 43. This matter came on for hearing on May 3, 2019.

BACKGROUND

On August 15, 2018, plaintiff/counter-defendant Cisco Systems, Inc. ("Cisco") filed this action against Uniloc USA, Inc., Uniloc 2017 LLC, and Uniloc Licensing USA LLC (collectively, "Uniloc" or "defendants/counter-claimants") seeking a declaration of non-infringement of U.S. Patent No. 6,980,522 ("the '522 patent"). Dkt. No. 1. On October 12, 2018, Cisco filed an amended complaint. Dkt. No. 16 ("FAC"). On October 26, 2018, Uniloc answered and counterclaimed against Cisco for infringement *1189of at least claim 6 of the '522 patent. Dkt. No. 19. In January 2019, upon Uniloc's unopposed motion and with the Court's approval, Uniloc filed an answer and supplemental counterclaim, removing Uniloc Licensing USA LLC as a counter-claimant. Dkt. Nos. 27, 28, 29, 30 ("Suppl. Countercl.").

The '522 patent, titled "Ad Hoc Radio Communication System," contains the following abstract:

In an ad-hoc radio communication system comprising a plurality of stations formed into at least one network, each station is assigned a rank representative of its suitability for performing the role of master station in a network. The rank may for example be assessed depending on the performance of the station's antenna or its access to mains power. It is arranged that the station having the highest rank in a network performs the role of master for that network, thereby improving the efficiency of communication in the network.

FAC, Ex. A ("Patent") at cover page.1 The patent "relates to a radio communication system comprising a plurality of stations capable of forming an ad-hoc network" as typified in a Bluetooth system. Id. at 1:4-8. "Such a network is intended to provide low-cost, short range radio links between mobile PC's, mobile phones and other devices, whether portable or not." Id. at 1:14-17. "Stations form ad-hoc networks which are known as piconets, each comprising a master station and up to seven slave stations. All stations are identical and capable of acting as master or slave as required. A station can take part in more than one piconet, thereby linking piconets and enabling communication over an extended range." Id. at 1:19-25.

According to the specification, a problem with the prior art "is that it is possible for a station having an inefficient antenna to operate as the master." Id. at 2:63-66. This can happen for a "wide range of reasons[,]" including inherently poor efficiency of the antenna, the antenna's radiation pattern, "antenna mismatch" that may be caused by the station's local environment, shadowing of the antenna by the host device or a user's body, and "polarization coupling loss, if the polarization of antenna in the master is not aligned with that in one or more of the slaves." Id. at 2:66-3:10. The patent proposes to solve this problem "by ranking each station in terms of its antenna performance. A station having the best antenna ranking then preferentially becomes the master. The antenna ranking can be determined under static conditions, or it may be adjusted dynamically depending on the local environment of a station...." Id. at 3:11-18. Ranking of stations may be based on other criteria beyond antenna performance: "other facts might usefully be taken into account in the ranking, either instead of or in addition to the antenna performance[,]" such as access to mains electricity versus battery power. Id. at 4:35-44.

Figure 3 of the patent "is a flow chart illustrating a method in accordance with the present invention for a new station joining an ad-hoc wireless network." Id. at 2:11-13.

*1190Claim 6 of the '522 patent reads as follows:

A method of operating an ad-hoc radio communication system having a plurality of stations formed into at least one network, the method comprising the step of:
determining a master/slave rank of each station in the network representative of the station's suitability for acting as master in the network using antenna performance characteristics of each station in view of the antenna's local environment; and enabling a station with the highest rank to be master.

Id. at 6:4-13.

In its counter-claim, Uniloc alleges that Cisco infringed at least claim 6 of the '522 patent.

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386 F. Supp. 3d 1185, Counsel Stack Legal Research, https://law.counselstack.com/opinion/cisco-sys-inc-v-uniloc-united-states-inc-cand-2019.