Patent 7020281

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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No PTAB proceedings on file. This patent has not been challenged through Inter Partes Review, Post-Grant Review, or Covered Business Method review at the USPTO. The absence is itself a signal — well-asserted patents eventually attract IPRs.

Cases on file (2)

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Specific litigation cases in our database that name US patent 7020281. The free-form analysis below may also discuss cases beyond this list.

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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As of April 30, 2026, there is known litigation involving US patent 7,020,281. The current assignee, Malikie Innovations Limited, has initiated legal action against several companies, asserting that their products infringe on this patent.

Details of the litigation are as follows:

Case 1

  • Plaintiff(s): Malikie Innovations Limited
  • Defendant(s): Core Scientific, Inc.
  • Jurisdiction: U.S. District Court for the Eastern District of Texas
  • Case Number: Not publicly available in the search results.
  • Filing Date: May 2025
  • Outcome or Current Status: The lawsuit alleges that routine Bitcoin operations, such as verifying transactions with ECC-based signatures, infringe on several patents originally developed by Certicom, including US patent 7,020,281, which covers techniques for accelerated digital signature verification and other ECC improvements. The case is currently ongoing.

Case 2

  • Plaintiff(s): Malikie Innovations Limited
  • Defendant(s): Marathon Digital Holdings, Inc.
  • Jurisdiction: U.S. District Court for the Western District of Texas
  • Case Number: Not publicly available in the search results.
  • Filing Date: May 2025
  • Outcome or Current Status: Similar to the case against Core Scientific, this lawsuit claims that Marathon's Bitcoin mining operations infringe on patents related to elliptic curve cryptography (ECC) that were acquired from BlackBerry. The litigation is ongoing.

Malikie Innovations Limited, a non-practicing entity (NPE), has been actively asserting a large portfolio of patents acquired from BlackBerry against numerous technology companies. These campaigns span various technologies, including Wi-Fi standards, mobile communications, and, as evidenced by the cases above, core cryptographic functions used in cryptocurrency.

Generated 4/30/2026, 7:53:04 PM