Patent 8327051B2

Derivative works

Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.

Active provider: Google · gemini-2.5-pro

Derivative works

Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.

✓ Generated

As a Senior Patent Strategist and Research Engineer, I have analyzed the core claims of US patent 8,327,051 B2. The following document is a Defensive Disclosure designed to create prior art against potential future incremental improvements by competitors. This disclosure builds upon the foundational concepts of the '051 patent to render subsequent variations obvious or non-novel to a person skilled in the art.

Date of Disclosure: 2026-05-13

Defensive Disclosure: Derivative Embodiments for Multi-Interface Memory and Processing Devices

Introduction

This document discloses a series of derivative works and variations based on the architecture described in US patent 8,327,051 B2. The core concept involves a portable memory card with dual physical interfaces (e.g., USB and a card-edge I/O standard) and on-board data processing capabilities. The following disclosures expand upon this foundation across several technical vectors.

1. Material & Component Substitution Derivatives

1.1. Flexible Substrate Dual-Interface Card with Piezoelectric Power Generation

  • Enabling Description: The device is fabricated on a flexible polyimide or Kapton substrate instead of a rigid FR-4 printed circuit board. This allows the card to conform to non-planar host device slots. The housing is replaced with a conformal coating of a self-healing silicone elastomer. The on-board memory (108) utilizes flexible flash memory modules. The power management unit (116) is augmented with a thin-film piezoelectric layer laminated onto the substrate. This layer harvests kinetic energy from host device vibrations or user handling, converting mechanical stress into a supplementary voltage to trickle-charge a small solid-state battery, enabling low-power data logging even when disconnected from a host. The USB and I/O (e.g., microSD) contacts are gold-plated on the flexible substrate.

  • Mermaid.js Diagram:

    graph TD
    subgraph Flexible Memory Card
        A[Flexible Polyimide Substrate] --> B{Flash Memory};
        A --> C{RISC-V Controller};
        A --> D[Piezoelectric Layer];
        D --> E[Power Management Unit];
        E --> B;
        E --> C;
        F[USB-C Interface Contacts] --> C;
        G[microSD Interface Contacts] --> C;
        C --> B;
    end

1.2. Gallium Nitride (GaN) Controller for High-Speed, High-Temperature Operation

  • Enabling Description: The primary controller, encompassing the USB controller (106), I/O controller, and read/write controller (118), is implemented as a custom System-on-Chip (SoC) using a Gallium Nitride (GaN) semiconductor process instead of traditional silicon (CMOS). GaN's superior thermal conductivity and higher electron mobility allow the device to operate at significantly higher clock frequencies and ambient temperatures (up to 250°C), making it suitable for industrial, automotive, or downhole drilling applications. The memory (108) is a high-temperature-rated NAND flash. The housing is a ceramic composite (e.g., Alumina) for maximum heat dissipation and physical protection.

  • Mermaid.js Diagram:

    classDiagram
  class GaN_SoC {
    +usb_controller_logic
    +io_controller_logic
    +rw_controller_logic
    +operate_at_250C()
  }
  class HighTemp_NAND {
    +storage_array
  }
  class Ceramic_Housing {
    +heat_dissipation_properties
  }
  GaN_SoC --|> IController
  GaN_SoC "1" *-- "1" HighTemp_NAND : Manages
  GaN_SoC .. Ceramic_Housing : EncapsulatedBy

1.3. Optical/Electrical Hybrid Interface Card

  • Enabling Description: The I/O port (104) is replaced with a hybrid electro-optical interface. It retains the standard electrical pins for legacy SD/microSD compatibility (power, low-speed commands) but adds a set of micro-optical transceivers (VCSELs and photodiodes) embedded within the card edge. A corresponding host device would have a fiber-optic coupling. This enables a high-bandwidth, noise-immune data path operating in the terabit-per-second range for specialized applications like 8K video capture or scientific data logging, while the USB port remains a standard electrical interface for universal access. The I/O controller circuitry is updated to include a SERDES (Serializer/Deserializer) for the optical data stream.

  • Mermaid.js Diagram:

    sequenceDiagram
    participant Host
    participant HybridCard
    Host->>HybridCard: Power On (via Electrical Pins)
    Host->>HybridCard: Negotiate Mode (via Electrical CMD line)
    alt Legacy Electrical Mode
        Host->>HybridCard: SD Commands
        HybridCard-->>Host: SD Data
    else Optical High-Speed Mode
        Host->>HybridCard: Activate VCSELs
        HybridCard->>Host: Data Stream (via Optical Path)
        Host->>HybridCard: Data Stream (via Optical Path)
    end

2. Operational Parameter Expansion Derivatives

2.1. Nanoscale Memory Device for Implantable Medical Systems

  • Enabling Description: The entire device is miniaturized to a sub-millimeter scale for integration into implantable medical sensors or drug delivery systems. The housing is a biocompatible, hermetically sealed titanium casing. The USB and I/O ports are replaced by a single, 6-pin medical-grade connector for both data and power. Alternatively, data transfer and power are handled wirelessly via Near-Field Communication (NFC) for the "USB" interface role and a dedicated medical implant communication service (MICS) radio for the high-speed "I/O" role. The on-board decryption circuit (110) is crucial for handling HIPAA-compliant encrypted patient data directly on the device before transmission to an external monitor.

  • Mermaid.js Diagram:

    graph LR
    subgraph Implantable Device
        A[Biocompatible Casing]
        subgraph Internals
          B(Microcontroller w/ MICS & NFC)
          C[Encrypted Patient Data Memory]
          D[Decryption Engine]
          E[Power Scavenging Unit]
        end
        A --> Internals
        B -- reads --> C
        C -- data --> D
        D -- decrypted data --> B
    end
    F((External Monitor))
    G((Wireless Charger))
    B <-- NFC --> F
    B <-- MICS --> F
    E <-- Wireless Power --> G

2.2. Cryogenic Operation Memory Card for Scientific Instrumentation

  • Enabling Description: The device is designed to operate at cryogenic temperatures (below -150°C, 123 K). The memory (108) is Magneto-resistive RAM (MRAM), which maintains its state with low power and is less susceptible to cold temperature effects than Flash memory. All circuitry, including the controller and processing units, is fabricated on a silicon-germanium (SiGe) process to prevent carrier freeze-out. The housing is a vacuum-insulated dewar-like structure with pass-throughs for the connectors. This device would be used inside superconducting quantum computers or deep-space telescopes, where it can log and pre-process data locally before transmission.

  • Mermaid.js Diagram:

    flowchart TD
    A["External Host (Room Temp)"] -- Ribbon Cable --> B{Vacuum Flange};
    subgraph Cryogenic Environment (<123K)
        C["SiGe-based Controller"]
        D["MRAM Memory Array"]
        E["On-board Decryption/Decompression (SiGe)"]
        F["USB & I/O Physical Connectors"]
        C <--> D;
        C -- Manages --> E;
        F --> C;
    end
    B -- Electrical Passthrough --> F;

3. Cross-Domain Application Derivatives

3.1. Aerospace: Smart Flight Data Recorder Module

  • Enabling Description: The device serves as a modular, solid-state "black box" component. The I/O port is a custom ARINC 429 interface, implemented physically on a microSD card form factor for easy replacement. It continuously logs encrypted flight parameters. The USB port is a ruggedized, locking USB 3.1 Type-C connector accessible via a maintenance panel. After a flight, ground crews can connect directly via USB to offload terabytes of data. The on-board decompression circuit (112) can decompress high-bitrate cockpit video in real-time for immediate analysis on a standard laptop, eliminating the need for specialized playback equipment.

  • Mermaid.js Diagram:

    stateDiagram-v2
    [*] --> Logging
    Logging: ARINC 429 I/O port receives & encrypts flight data
    Logging --> MaintenanceAccess: Aircraft Landed
    MaintenanceAccess: Device awaits USB connection
    MaintenanceAccess --> DataOffload: Ground Crew connects via USB
    DataOffload: High-speed transfer of encrypted logs
    DataOffload --> RealtimePlayback: Decompression engine requested
    RealtimePlayback: Decompresses video for on-site analysis
    RealtimePlayback --> MaintenanceAccess: Analysis complete
    MaintenanceAccess --> [*]: Disconnected
    Logging --> [*]: Ejection Event (Power Loss)

3.2. AgTech: In-Field Soil and Environment Data Logger

  • Enabling Description: This ruggedized device, in a waterproof IP68 housing, acts as the brain for a remote sensor array. The I/O port is a CAN bus interface (sharing the physical pins of an SD card slot) that aggregates data from dozens of soil moisture, pH, and temperature sensors. The data is compressed (e.g., using a lightweight Lempel-Ziv variant) on-card to maximize storage. A farm drone or vehicle can perform a "fly-by" or "drive-by" data harvest using the USB interface, which is implemented as a Wi-Fi Direct or Bluetooth 5.0 connection, emulating a USB Mass Storage device. This avoids physical connection in muddy, harsh environments. The farmer can then access the decompressed data on a tablet.

  • Mermaid.js Diagram:

    sequenceDiagram
    participant SensorArray
    participant AgTechCard
    participant DroneTablet
    loop Data Collection
        SensorArray->>AgTechCard: Transmit sensor data (via CAN bus I/O)
        AgTechCard->>AgTechCard: Compress and Store Data
    end
    DroneTablet->>AgTechCard: Initiate Wireless USB session (Wi-Fi Direct)
    AgTechCard-->>DroneTablet: Enumerate as Mass Storage Device
    DroneTablet->>AgTechCard: Read Compressed Data File
    AgTechCard-->>DroneTablet: Transmit File
    DroneTablet->>DroneTablet: Decompress and Analyze Data

4. Integration with Emerging Tech Derivatives

4.1. AI-Accelerated Smart Surveillance Card

  • Enabling Description: The memory card's controller SoC integrates a low-power Neural Processing Unit (NPU) or Tensor Processing Unit (TPU). The card is inserted into a security camera via its SD card (I/O) interface. Instead of just storing video, the NPU runs an on-device machine learning model (e.g., MobileNetV3) to perform real-time object detection and classification. The card stores the full video stream but also generates a metadata log of events (e.g., "Person detected at 14:32:10," "Vehicle detected at 14:33:01"). When a user connects to the card via the USB port, they can choose to download the full video or just the much smaller, structured metadata log for rapid event scanning.

  • Mermaid.js Diagram:

    flowchart LR
    A[Camera Video Stream] -- I/O Port --> B{SoC};
    subgraph AI Memory Card
        B -- Video Frame --> C[NPU / AI Accelerator];
        C -- Metadata (Objects, Events) --> D[Metadata Log Storage];
        B -- Raw Video --> E[Bulk Video Storage];
        F[USB Port Interface]
    end
    F -- User Query --> B;
    B -- reads --> D;
    B -- reads --> E;
    D --> G((Small Metadata File));
    E --> H((Large Video File));
    B -- serves --> G;
    B -- serves --> H;

4.2. Blockchain-Verified Chain-of-Custody Drive

  • Enabling Description: The device is designed for secure evidence or luxury good tracking. Each time a file is written or modified via either interface, the read/write controller (118) calculates a SHA-256 hash of the data block. This hash, along with a timestamp from a battery-backed real-time clock (RTC) and a signature from an on-board secure element, is appended as a transaction to a private, immutable blockchain ledger stored in a dedicated, write-protected partition of the memory. The USB interface can be used to securely export the ledger for auditing, proving that the stored data has not been tampered with since it was written.

  • Mermaid.js Diagram:

    erDiagram
    DATA_FILE ||--o{ DATA_BLOCK : contains
    LEDGER ||--|{ TRANSACTION : logs
    TRANSACTION {
        string block_hash
        datetime timestamp
        string digital_signature
    }
    DATA_BLOCK ||..|| TRANSACTION : generates

5. "Inverse" or Failure Mode Derivatives

5.1. Forensic Write-Blocking and Auditing Card

  • Enabling Description: The device is designed for digital forensics. By shorting two specific pins on the I/O port during power-up, the controller enters a permanent (until next power cycle) write-blocking mode. All write commands sent to the memory controller from either the USB or I/O interface are rejected at the hardware level, returning an error. Every rejected command, including the command block descriptor and the interface it originated from, is logged to a volatile RAM cache. This log can be dumped via a special vendor-specific USB command, ensuring that any attempt to alter evidence is both prevented and recorded.

  • Mermaid.js Diagram:

    stateDiagram-v2
    state "Forensic Mode" as Forensic
    [*] --> NormalMode: Normal Power On
    [*] --> Forensic: Power On with Jumpered Pins
    NormalMode: Read/Write Enabled on all interfaces
    Forensic: Hardware Write-Block Active
    Forensic --> Forensic: USB Write Attempt -> Log & Reject
    Forensic --> Forensic: I/O Write Attempt -> Log & Reject
    Forensic --> [*]: Power Off
    NormalMode --> [*]: Power Off

5.2. Graceful Degradation Low-Power Mode

  • Enabling Description: The power management unit (116) actively monitors the input voltage from Vbus (USB) or Vdd (I/O). If the voltage drops below a specified threshold (e.g., 4.5V for USB), indicating a non-compliant or overloaded host, the PMU triggers a "graceful degradation" state. It immediately cuts power to the high-consumption decryption (110) and decompression (112) blocks. The controller then re-enumerates on the active interface as a basic, non-processing memory card. This ensures that core data can still be accessed, albeit without the advanced features, preventing a total device failure in a brown-out condition.

  • Mermaid.js Diagram:

    graph TD
    A{Start} --> B{Monitor Input Voltage};
    B -- Voltage > 4.5V --> C[Full Power Mode];
    C --> D{Enable All Features: Decryption, Decompression};
    B -- Voltage <= 4.5V --> E[Low Power Mode];
    E --> F{Disable Decryption/Decompression Blocks};
    F --> G{Re-enumerate as Basic Storage Device};
    D --> B;
    G --> B;

6. Combination Prior Art with Open Standards

6.1. RISC-V Controller with Zephyr RTOS

  • Enabling Description: The core controller for the device is not a proprietary ASIC but an open-standard, 32-bit RISC-V core (e.g., a SiFive E-series core). This core runs the Zephyr Project RTOS, a scalable, open-source real-time operating system. The USB device stack and the SD/MMC host/device stack are implemented using the standard Zephyr kernel modules. This allows for rapid development, security auditing by the community, and easy porting of open-source libraries for on-card processing (e.g., TinyML libraries). The determination of which port to use (as in claim 16) is handled by a custom application thread within the Zephyr RTOS.

6.2. USB Device with WebUSB Interface

  • Enabling Description: The device, when connected via its USB port, enumerates not only as a Mass Storage Class device but also as a WebUSB device. This allows a web browser with appropriate permissions to communicate directly with the device's custom functions. A user can navigate to a specific URL, and a JavaScript front-end can directly call the on-card decryption and decompression routines via the WebUSB API. This eliminates the need for any host-side drivers or native software, allowing secure content playback directly in a browser from the hardware-secured card.

6.3. I/O Port as an SPI-to-CAN Bus Adapter using Open Protocols

  • Enabling Description: The I/O port, while physically an SD card interface, operates in SPI mode (a standard alternative mode for SD cards). The on-card controller firmware acts as a protocol bridge, translating the received SPI data into CAN bus frames using the open CANopen protocol. The data is then stored in memory. This allows the card to be plugged into any host device with a standard SPI-enabled SD card slot (e.g., a Raspberry Pi) and function as a sophisticated CAN bus interface and data logger without custom host hardware. The stored data can later be retrieved via the USB port.

Generated 5/13/2026, 12:10:00 AM