Crestone IP Management LLC v. Apple Inc

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Crestone IP Management, LLC (Delaware)
  • Defendant: Apple Inc. (California)
  • Plaintiff's Counsel: Devlin Law Firm LLC
• Case Identification: 1:26-cv-01976, W.D. Tex., 07/16/2026
• Venue Allegations: Plaintiff alleges venue is proper in the Western District of Texas because Defendant Apple has committed acts of infringement in the district and maintains multiple "regular and established places of business," including two large corporate campuses, a manufacturing facility, an engineering center, and several retail stores.
• Core Dispute: Plaintiff alleges that Defendant's mobile phones, iPads, and MacBooks infringe four patents related to semiconductor and telecommunications technologies.
• Technical Context: The asserted patents cover a range of technologies integral to modern computing devices: hybrid clock oscillators, secure platform modules, remote media device control, and adaptive voltage regulation in memory circuits.
• Key Procedural History: The complaint alleges that the asserted patents originate from a portfolio developed by Microchip Technology Incorporated and its affiliates. Plaintiff alleges it provided Defendant with actual notice of infringement for each patent prior to filing the complaint, forming the basis for allegations of willful infringement.

Case Timeline

Date	Event
2006-03-24	U.S. Patent 8,261,072 Priority Date
2006-10-11	U.S. Patent 7,599,231 Priority Date
2009-10-07	U.S. Patent 7,599,231 Issues
2010-05-12	U.S. Patent 9,288,534 Priority Date
2012-09-04	U.S. Patent 8,261,072 Issues
2016-03-15	U.S. Patent 9,288,534 Issues
2017-04-19	U.S. Patent 10,771,012 Priority Date
2020-09-08	U.S. Patent 10,771,012 Issues
2025-07-17	Alleged Notice of Infringement for '012, '072, '534 Patents
2025-08-26	Alleged Follow-Up Notice for '012, '072, '534 Patents
2026-06-25	Alleged Notice of Infringement for '231 Patent
2026-07-16	Complaint Filed

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 10,771,012 - Hybrid RC/crystal oscillator

• Patent Identification: U.S. Patent No. 10,771,012, issued September 8, 2020 Compl. ¶¶21-22

The Invention Explained

• Problem Addressed: The patent's background describes the need for a clock source in modern integrated circuits that is both accurate and flexible Compl. ¶26 Conventional approaches force a choice between an external crystal (accurate but slow to start and less reliable) and an internal tunable oscillator (fast and flexible but less accurate) Compl. ¶26
• The Patented Solution: The patent discloses a hybrid system that uses an internal tunable resistor-capacitor (RC) oscillator as the primary clock source while using an external crystal as a reference sensor to continuously adjust the internal oscillator's frequency Compl. ¶27 '012 Patent, abstract '012 Patent, col. 4:56-65 This architecture, depicted in Figure 1 of the patent, aims to combine the fast start-up and reliability of an internal oscillator with the accuracy provided by a crystal reference '012 Patent, Fig. 1 '012 Patent, col. 9:25-34
• Technical Importance: This hybrid approach is asserted to provide improved reliability, accuracy, fast startup, and high-frequency stability for clock signals in processors and microcontrollers Compl. ¶29

Key Claims at a Glance

• The complaint asserts independent claim 19 Compl. ¶28
• Claim 19, a system claim, recites the following essential elements:
  • A semiconductor device with a first external pin and an internal oscillator.
  • An external resonant element (e.g., a crystal) coupled to the device through the pin.
  • The internal oscillator comprises a tunable oscillator, a phase detector circuit, and an oscillator controller circuit.
  • The oscillator controller circuit is configured to adjust the frequency of the tunable oscillator based on phase detection between the output of the tunable oscillator and the output of the external resonant element.
  • A final clause requires that the controller is configured to use the output of the external resonant element to adjust the tunable oscillator's frequency "during the entire operation of the tunable oscillator."

U.S. Patent No. 8,261,072 - Method and system for secure external TPM password generation and use

• Patent Identification: U.S. Patent No. 8,261,072, issued September 4, 2012 Compl. ¶¶30-31

The Invention Explained

• Problem Addressed: The patent identifies weaknesses in traditional computer security like passwords and keys Compl. ¶35 Even with the use of a Trusted Platform Module (TPM), communicating secrets from external devices (e.g., biometric scanners) creates vulnerabilities where they can be intercepted by malware Compl. ¶37
• The Patented Solution: The invention teaches a system to securely generate and convey access codes from a "remote device" to a TPM without exposing the codes to software attack Compl. ¶38 A computer system's TPM receives a "secure access code" from a remote device, along with "usage authorization information" that is "attached to" the code; the TPM then recognizes and uses this code as a parameter for secure commands Compl. ¶39 '072 Patent, col. 1:17-23
• Technical Importance: The invention is asserted to improve system security during normal operation by securely integrating external hardware with a TPM, without decreasing the system's usability or accessibility for the user Compl. ¶40

Key Claims at a Glance

• The complaint asserts independent claim 1 Compl. ¶39
• Claim 1, a computer system claim, recites the following essential elements:
  • A computer system with standard components (CPUs, RAM, ROM, I/O adapter, user interface adapter).
  • A trusted platform module configured to perform a series of operations, including:
    • receiving a secure access code from a remote device outside the TPM;
    • receiving usage authorization information generated by a secure generator, with this information "being attached to the secure access code";
    • recognizing the secure access code; and
    • using the secure access code as a parameter for trusted platform module commands.

U.S. Patent No. 9,288,534 - Systems and methods for operating media devices

• Patent Identification: U.S. Patent No. 9,288,534, issued March 15, 2016 Compl. ¶¶41-42
• Technology Synopsis: The patent addresses the difficulty of controlling multiple, disparate media devices, some of which may lack network capability Compl. ¶46 The invention describes using a mobile computing device as a "remote controller" to bridge communication between media sources (e.g., a media server) and media players (e.g., a TV), creating a unified and protocol-agnostic control interface Compl. ¶48
• Asserted Claims: Independent claim 6 Compl. ¶49
• Accused Features: Apple iPhones, iPads, and MacBooks are accused of infringement when acting as remote controllers for communicating with media sources and media players Compl. ¶83

U.S. Patent No. 7,599,231 - Adaptive regulator for idle state in a charge pump circuit of a memory device

• Patent Identification: U.S. Patent No. 7,599,231, issued October 7, 2009 Compl. ¶¶51-52
• Technology Synopsis: The patent addresses performance degradation in memory devices caused by voltage spikes or drops when switching between high-voltage operations (e.g., programming) and other operations Compl. ¶56 The patented solution is a "controlled transition scheme" that uses an intermediate "idle voltage state" to reduce these electrical disturbances, thereby isolating memory cells and improving performance Compl. ¶57
• Asserted Claims: Independent claim 12 Compl. ¶58
• Accused Features: The complaint accuses Apple smartphones that use "TLC 3D NAND flash memory," such as devices incorporating "the exemplary Kioxia 2yy NAND," of infringement Compl. ¶93

III. The Accused Instrumentality

Product Identification

The complaint collectively defines the "Accused Products" as a broad range of Apple's computing devices, including its mobile phones, iPads, and MacBooks Compl. ¶1 Specific infringement allegations are directed at subsets of these products:

• Smartphones using a "hybrid RC/crystal oscillator," such as the "Apple iPhone 16e" ('012 Patent) Compl. ¶63
• Devices using "Secure Enclave for Biometric Security," including a wide range of recent iPhones, iPads, and MacBooks ('072 Patent) Compl. ¶73
• Devices "capable of serving as a remote controller," including a wide range of recent iPhones, iPads, and MacBooks ('534 Patent) Compl. ¶83
• Smartphones using "TLC 3D NAND flash memory," including those with "Kioxia 2yy NAND" ('231 Patent) Compl. ¶93

Functionality and Market Context

The complaint alleges that the accused technologies are integral to the core functionality of Apple's products. These functionalities include clock generation for processors, secure biometric authentication, remote control of media ecosystems, and the operation of flash memory Compl. ¶26 Compl. ¶27 The complaint emphasizes Apple's substantial commercial presence and sales in the United States and the Western District of Texas specifically Compl. ¶¶10, 12, 17

IV. Analysis of Infringement Allegations

No probative visual evidence provided in complaint. The complaint references claim chart exhibits that were not included with the filing Compl. ¶64 Compl. ¶74 Compl. ¶84 Compl. ¶94 The infringement theories are summarized below in prose.

'012 Patent Infringement Allegations

• Narrative Theory: The complaint alleges that certain Apple smartphones, such as the "iPhone 16e," contain a "hybrid RC/crystal oscillator" that directly infringes claim 19 Compl. ¶63 The theory posits that these devices use an internal tunable oscillator for clock generation, which is continuously adjusted and stabilized by referencing an external crystal, thereby meeting the elements of the asserted system claim Compl. ¶¶27-28
• Identified Points of Contention:
  • Scope Question: A key dispute may arise over the claim term "during the entire operation." The court may be asked to determine whether this requires the external crystal to provide continuous, real-time feedback for adjustment, or if periodic calibration or correction during specific operational states would suffice.
  • Technical Question: Plaintiff will need to provide evidence demonstrating that Apple's System-on-Chip (SoC) architecture includes the specific "phase detector circuit" and "oscillator controller circuit" structures as claimed, and that they function to adjust frequency in the manner required by claim 19.

'072 Patent Infringement Allegations

• Narrative Theory: The complaint alleges that a wide range of Apple products featuring the "Secure Enclave for Biometric Security" infringe claim 1 Compl. ¶73 The theory asserts that Apple's Secure Enclave functions as the claimed "trusted platform module." It is alleged to receive a "secure access code" and "usage authorization information" from a remote device (such as a fingerprint sensor) to execute secure commands, mapping to the operational steps recited in the claim Compl. ¶¶38-39
• Identified Points of Contention:
  • Scope Question: The analysis will likely focus on whether the data transmitted from a biometric sensor to the Secure Enclave can be characterized as two distinct elements: a "secure access code" and "usage authorization information... attached to" it. The definition of "attached to" may be a central point of claim construction.
  • Technical Question: Evidence will be needed to clarify the precise nature and structure of the data packets communicated between Apple's biometric sensors and the Secure Enclave. The question is whether this data stream contains separable components that map to the distinct "code" and "authorization information" limitations of claim 1.

V. Key Claim Terms for Construction

'012 Patent, Claim 19

• The Term: "during the entire operation of the tunable oscillator"
• Context and Importance: This temporal limitation is critical for infringement. Practitioners may focus on this term because if Apple's accused oscillators use the external crystal only for initial calibration or in specific, non-continuous modes, it may not meet this requirement. The dispute will center on the meaning of "entire operation."
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: Language in the specification emphasizing the goal of maintaining accuracy across operational ranges and providing fault-tolerance could support an interpretation requiring continuous or near-continuous adjustment to achieve stability '012 Patent, col. 4:60-65 '012 Patent, col. 9:25-44
  • Evidence for a Narrower Interpretation: The specification's discussion of detecting a "locked frequency" and states like "searching," "locked," or "lock lost" suggests a state-based system, which could support an argument that "entire operation" does not literally mean every clock cycle but refers to the general period during which the oscillator is active and locked '012 Patent, col. 8:26-39

'072 Patent, Claim 1

• The Term: "usage authorization information being attached to the secure access code"
• Context and Importance: This phrase is central to infringement, as it requires a specific relationship between two distinct pieces of information received by the TPM. Practitioners may focus on this term because the infringement case depends on mapping Apple's security data protocol to this "attachment" structure.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The patent's abstract and general description focus on the broad goal of securely conveying information Compl. ¶38 This could support an argument that "attached to" means "associated with" or "transmitted in the same session," rather than requiring a specific data-structuring format.
  • Evidence for a Narrower Interpretation: The claim language recites two distinct "receiving" steps for the code and the authorization information, which may suggest they are separable entities. The phrase "attached to" could be interpreted to require a specific encapsulation or binding, where one element is formally appended to the other, a structure that may or may not be present in the accused system '072 Patent, col. 10:4-9

VI. Other Allegations

• Indirect Infringement: While the complaint's formal counts are for direct infringement Compl. ¶¶63, 73, 83, 93, the allegations may also lay a foundation for indirect infringement theories. For instance, the '534 patent is asserted against devices "capable of serving as a remote controller," which suggests that Apple provides the tools and instructions for users to perform the allegedly infringing methods of controlling media devices Compl. ¶83
• Willful Infringement: The complaint explicitly alleges willful infringement for all asserted patents. The basis for this allegation is purported pre-suit knowledge, stemming from notice of infringement letters allegedly sent to Apple on specific dates (e.g., July 17, 2025, and August 26, 2025, for the '012 patent) Compl. ¶66 Compl. ¶76 Compl. ¶86 Compl. ¶96 Plaintiff seeks enhanced damages based on this alleged willful conduct Compl. p. 23

VII. Analyst's Conclusion: Key Questions for the Case

This case presents a multi-front dispute across several distinct technologies. The outcome will likely depend on the court's resolution of the following key questions:

1. A central issue will be one of definitional scope: Can the claim term "usage authorization information being attached to the secure access code" in the '072 patent be construed to read on the integrated data stream passed between Apple's biometric sensors and its Secure Enclave? This will require a detailed analysis of both the patent's language and the technical operation of Apple's security architecture.

2. A second core issue is one of temporal and functional mapping: Does Apple's hybrid oscillator, accused of infringing the '012 patent, use its external crystal for adjustment "during the entire operation" as claimed, or is its function more limited? Similarly, for the '534 patent, does an iPhone controlling an Apple TV map to the claim's specific architecture of separate communication links with a "media player" and a "media source"? These questions will turn on fact-intensive evidence regarding how Apple's highly integrated systems actually function.

3. A key evidentiary question will be one of component-level proof: For technologies like the adaptive voltage regulation in the '231 patent, which is allegedly practiced by third-party "Kioxia 2yy NAND" memory within an iPhone, what evidence will be required to prove that the specific, low-level circuit operations recited in the claims are actually performed by that component as integrated and used by Apple? This raises complex questions of proof for infringement by component supply and integration.