InnoMemory v. Southstar Bank: Voluntary Dismissal in Memory Patent Case Involving Memory Refresh Technology

Case Overview

In a case that closed almost as swiftly as it opened, *InnoMemory, LLC v. Southstar Bank S.S.B.* (Case No. 7:25-cv-00049) concluded with a voluntary dismissal without prejudice after just 95 days in the Western District of Texas. Filed on February 3, 2025, and dismissed on May 9, 2025, the memory patent infringement action centered on U.S. Patent No. 7,057,960 B1 — covering a method and architecture for reducing power consumption in memory device refresh operations.

The case is a textbook example of early-stage patent litigation strategy: a plaintiff asserting a semiconductor memory patent against a regional financial institution, followed by a swift Rule 41 exit before the defendant could serve an answer or motion for summary judgment. While the dismissal forecloses any immediate precedent on the merits, the case offers valuable insights into non-practicing entity (NPE) assertion patterns, venue selection in Western Texas, and the tactical use of voluntary dismissal in patent litigation.

For patent attorneys, in-house IP counsel, and R&D leaders monitoring memory technology patent risk, this case warrants careful attention.

The Parties

The Patent at Issue

This case centered on U.S. Patent No. 7,057,960 B1, covering a method and architecture for reducing power consumption in memory device refresh operations. Key details include:

• • Patent Number: US7,057,960 B1
• • Application Number: US10/629,667
• • Technology Area: Semiconductor memory architecture
• • Subject Matter: Method and architecture for reducing power consumption for memory devices in refresh operations

The ‘960 patent addresses a known challenge in memory design: DRAM (Dynamic Random Access Memory) cells require periodic refresh cycles to retain stored data, consuming significant power. The patent claims a method and architectural approach designed to reduce that energy burden — a commercially significant innovation in embedded systems, mobile devices, and any power-sensitive computing environment.

Legal Representation & Procedural History

Legal Teams

Plaintiff: Isaac Rabicoff of **Rabicoff Law LLC** — a firm recognized for representing patent assertion entities in technology infringement matters.

Defendant: A five-attorney team from **Fish & Richardson PC**, including Neil J. McNabnay, Alexander H. Martin, Brandon S. Avers, Lance E. Wyatt Jr., and Michael A. Vincent — one of the nation’s premier patent litigation firms, signaling Southstar Bank’s commitment to a robust defense posture.

Litigation Timeline

The litigation proceeded to a critical early juncture: InnoMemory filed a Notice of Voluntary Dismissal Without Prejudice (Doc. 15) on May 8, 2025 — notably before Southstar Bank had served an answer or a motion for summary judgment. This timing was legally precise and strategically deliberate, as Rule 41(a)(1)(A)(i) permits a plaintiff to self-effectuate dismissal at this stage without requiring court approval.

The court’s May 9, 2025 order confirmed the dismissal as self-executing, citing the Fifth Circuit’s ruling in *In re Amerijet Int’l, Inc.*, 785 F.3d 967, 973 (5th Cir. 2015). No sanctions, damages, or attorney fee awards were imposed — each party was directed to bear its own costs.

The Verdict & Legal Analysis

Outcome

The case terminated via **voluntary dismissal without prejudice** under Federal Rule of Civil Procedure 41(a)(1)(A)(i). No merits determination was reached. No damages were awarded. No injunctive relief was granted or denied. The dismissal is without prejudice, meaning InnoMemory retains the legal right to refile claims against Southstar Bank or other defendants based on the same patent.

Verdict Cause Analysis

Because dismissal occurred before Southstar Bank filed an answer or any dispositive motion, the court made no substantive rulings on:

• Claim construction of the ‘960 patent
• Infringement of the asserted memory refresh method claims
• Patent validity (novelty, obviousness, or enablement challenges)
• Damages calculations or willful infringement allegations

The absence of these rulings means the ‘960 patent’s legal strength — or vulnerability — remains untested in this proceeding. However, Fish & Richardson’s engagement of a five-attorney defense team suggests Southstar Bank was preparing a vigorous response, potentially including invalidity contentions or non-infringement positions that may have influenced InnoMemory’s decision to exit.

Legal Significance

This dismissal carries **no direct precedential value** on the merits of memory patent infringement law. However, its procedural significance is clear: the Fifth Circuit’s *Amerijet* standard, affirmed here, confirms that Rule 41(a)(1)(A)(i) dismissals are self-effectuating when filed before an answer or summary judgment motion — requiring no judicial intervention and imposing no automatic fee-shifting.

Critically, the **”without prejudice”** designation preserves InnoMemory’s option to reassert US7,057,960 B1 against Southstar Bank or pursue parallel assertions against similarly situated defendants. This is a common NPE strategy: test a defendant’s response posture, assess litigation costs, then decide whether to refile, settle, or redirect enforcement efforts.

Strategic Takeaways

For Patent Holders & NPEs:

Early voluntary dismissal under Rule 41(a)(1)(A)(i) is a low-cost exit when a defendant signals strong, well-resourced opposition. Reassertion remains available, but timing and defendant selection become more critical with each refiling cycle.

For Accused Infringers:

Assembling a credible, large defense team rapidly — as Southstar Bank did with Fish & Richardson — can deter plaintiffs from pursuing expensive litigation. Proactive invalidity research and early claim construction positioning can accelerate this signaling effect.

For R&D & In-House Counsel:

Any product or system incorporating DRAM refresh management processes should be evaluated against US7,057,960 B1. The patent’s claims covering power-reduction methods in memory refresh cycles may implicate a wide range of hardware and embedded software implementations beyond traditional semiconductor manufacturers.