Arlington Technologies LLC v. RingCentral, Inc.

CourtDistrict Court, D. Delaware
DecidedMarch 10, 2026
Docket1:25-cv-00613
StatusUnknown

This text of Arlington Technologies LLC v. RingCentral, Inc. (Arlington Technologies LLC v. RingCentral, Inc.) is published on Counsel Stack Legal Research, covering District Court, D. Delaware primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

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Arlington Technologies LLC v. RingCentral, Inc., (D. Del. 2026).

Opinion

IN THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF DELAWARE

ARLINGTON TECHNOLOGIES LLC,

Plaintiff, Before: Jennifer Choe-Groves, Judge

v. Court No. 1:25-cv-00613-JCG

RINGCENTRAL, INC.,

Defendant.

OPINION AND ORDER [Granting in part and denying in part Defendant’s Motion to Dismiss.]

Dated: March 10, 2026

Stephen B. Brauerman and Ronald P. Golden, II, Bayard, P.A., of Wilmington, DE; Patrick J. Conroy, Justin B. Kimble, Jon Rastegar, and Nathan L. Levenson, Nelson Bumgardner Conroy PC, of Dallas, TX. Attorneys for Plaintiff Arlington Technologies LLC.

Jennifer Ying, Karen Jacobs, and Ben Yenerall, Morris, Nichols, Arsht & Tunnell LLP, of Wilmington, DE; Karineh Khachatourian, David T. Xue, and Trevor T. Giampaoli, KXT LAW, LLP, of Redwood City, CA. Attorneys for Defendant RingCentral, Inc.

Choe-Groves, Judge: Plaintiff Arlington Technologies LLC (“Plaintiff” or “Arlington Tech.”) filed this case against Defendant RingCentral, Inc. (“Defendant” or “RingCentral”) alleging infringement of U.S. Patent Numbers 7,366,110 (“’110 Patent”), 7,441,141 (“’141 Patent”), 8,145,945 (“’945 Patent”), 9,026, 836 (“’836 Patent”), 7,668,304 (“’304 Patent”), 10,630,733 (“’733 Patent”), 9,432,517 (“’517 Patent”), and 9,094,572 (“’572 Patent”) (collectively, “Asserted

Patents”). Pl.’s First Am. Compl. Pat. Infringement (“Am. Compl.”) (D.I. 16); see Am. Compl. at Ex. 1 (“’110 Patent”) (D.I. 16-1); Am. Compl. at Ex. 2 (“’141 Patent”) (D.I. 16-2); Am. Compl. at Ex. 3 (“’945 Patent”) (D.I. 16-3); Am. Compl.

at Ex. 4 (“’836 Patent”) (D.I. 16-4); Am. Compl. at Ex. 5 (“’304 Patent”) (D.I. 16- 5); Am. Compl. at Ex. 6 (“’733 Patent”) (D.I. 16-6); Am. Compl. at Exs. 7, 8 (“’517 Patent”) (D.I. 16-7, 16-8); Am. Compl. at Ex. 9 (“’572 Patent”) (D.I. 16-9). Before the Court is Defendant RingCentral, Inc.’s Motion to Dismiss the

First Amended Complaint Pursuant to Fed. R. Civ. P. 12(b)(6) (“Motion to Dismiss”) (D.I. 19). See Def. RingCentral, Inc.’s Opening Br. Supp. Mot. Dismiss First Am. Compl. (“Def.’s Br.”) (D.I. 20). Plaintiff opposed the motion, and

Defendant filed a reply brief. Pl’s Resp. Opp. Def.’s Mot. Dismiss (“Pl.’s Resp. Br.”) (D.I. 22); Def. RingCentral, Inc.’s Reply Supp. Mot. Dismiss First Am. Compl. (“Def.’s Reply Br.”) (D.I. 23). For the reasons discussed below, Defendant’s Motion to Dismiss is granted

in part and denied in part. BACKGROUND Arlington Tech. is a limited liability company with its principal place of

business in Allen, TX. Am. Compl. at ¶ 1. Arlington Tech. is the owner of all right, title, and interest in the Asserted Patents. Id. at ¶ 35. The First Amended Complaint alleges that RingCentral is a Delaware corporation with its principal

place of business in Belmont, CA, and is a multinational information technology company that develops and provides cloud-based communication and collaboration services. Id. at ¶¶ 2–3. Arlington Tech. claims that RingCentral sells its products

and phone, messaging, and video services in Delaware. Id. at ¶ 3. RingCentral allegedly operates the websites RingCentral.com and Support.RingCentral.com, where it markets, offers, distributes, and provides technical support for its services. Id. at ¶ 4.

Arlington Tech. asserts that RingCentral has and continues to directly and indirectly infringe one or more claims of the Asserted Patents in violation of 35 U.S.C. § 271. Id. at ¶¶ 50, 69, 88, 106, 124, 142, 163, 180. The following

products are identified as directly infringing the Asserted Patents: Webinar and RingSense (“’110 Accused Products”) (“’141 Accused Products”) (“’945 Accused Products”) (“’836 Accused Products”); Video Meetings and Rooms (“’304 Accused Products”) (“’733 Accused Products”) (“’572 Accused Products”); and

RingSense (“’517 Accused Product”) (collectively, “Accused Products”). Id. at ¶¶ 51, 70, 89, 107, 125, 143, 164, 181. Arlington Tech. alleges that RingCentral indirectly infringed the Asserted Patents by induced and contributory infringement

in violation of 35 U.S.C. §§ 271(b)–(c). Id. at ¶¶ 61–62, 80–81, 98–99, 116–17, 134–35, 155–56, 172–73, 188–89. Arlington Tech. claims that it has complied with the requirements of 35 U.S.C. § 287 to warrant recovery of pre-suit damages

and that RingCentral’s continued willful infringement warrants enhanced damages under 35 U.S.C. § 284. Id. at ¶¶ 45, 63, 82, 100, 118, 136, 157, 174, 190. I. The Asserted Patents and the Accused Products

A. The ’110, ’141, ’945, and ’836 Patents (Apache Kafka Patents) The ’110 Patent was issued by the United States Patent and Trademark Office (“USPTO”) on April 29, 2008, and is titled “Method and apparatus for merging call components during call reconstruction.” Id. at ¶ 36; see ’110 Patent.

The ’141 Patent was issued on October 21, 2008 by the USPTO and is titled “Backup of network devices.” Id. at ¶ 37; see ’141 Patent. The ’945 Patent was issued on March 27, 2021 by the USPTO and is titled “Packet mirroring between

primary and secondary virtualized software images for improved system failover performance.” Id. at ¶ 38; see ’945 Patent. The ’836 Patent was issued on May 5, 2021 by the USPTO and is titled “Call restoration in response to application failure.” Id. at ¶ 39; see ’836 Patent.

Arlington Tech. alleges that RingCentral designs, offers for sale, uses, and sells services and products such as Webinar and RingSense that directly infringe the ’110, ’141, ’945, and ’836 Patents. Id. at ¶¶ 51, 70, 89, 107. Arlington Tech.

claims that RingCentral licenses and uses Apache Kafka in the ’110, ’141, ’945, and ’836 Accused Products. Id. The First Amended Complaint alleges that RingCentral “uses Apache Kafka, including Apache Kafka streams, in the Accused

Products” in Counts I–IV. Id. at ¶¶ 52, 71, 90, 108. For Counts I–IV, to show that RingCentral incorporates Apache Kafka in the Accused Products, the First Amended Complaint includes exemplary images of flow charts and links showing

open source licenses that Arlington Tech. attributes to RingCentral, which allegedly show that RingCentral’s Accused Products infringe the ’110, ’141, ’945, and ’836 Patents. Id. at ¶¶ 51–52, 70–71, 89–90, 107–08. Arlington Tech. argues that more evidence of Webinar and RingSense’s use of Apache Kafka and Apache

Kafka streams will be found in the source code that is not publicly available. Id. at ¶¶ 52, 71, 90, 108. In pleading induced infringement, Arlington Tech. alleges that RingCentral

has known of the ’110, ’141, ’945, and ’836 Patents since at least March 8, 2024, when Arlington Tech. contacted RingCentral about infringement and since the filing of the Complaint. Id. at ¶¶ 60–61, 79–80, 97–98, 115–16. Arlington Tech. states that RingCentral contributes to infringement, under 35 U.S.C. § 271(c), of

one or more claims of the ’110, ’141, ’945, and ’836 Patents through distributors, customers, subsidiaries, importers, and consumers that use, import, purchase, or sell the ’110, ’141, ’945, and ’836 Accused Products. Id. at ¶¶ 62, 81, 99, 117.

Arlington Tech.

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