Mrs. Tiffany Cheung, Attorney
- Address of record
- Morrison & Foerster, LLP, 425 Market Street, 32nd Floor, San Francisco, CA 94105-2482
- tcheung@mofo.com
Contact details as filed with the court in the cases below.
Case history
Publicly tracked matters where this attorney is listed as counsel.
Arise Virtual Solutions Class Action
This is a newly filed appellate proceeding in which Diavion De Niro petitions for a writ of mandamus or prohibition directed at the U.S. District Court for the District of Nevada, with Arise Virtual Solutions, Inc. listed as the real party in interest. The docket does not describe the underlying allegations, but the case was surfaced as a putative class action against Arise. These are allegations in ongoing litigation, not established facts or a settlement.
- Filed
- August 29, 2025
- Represents
- ARISE VIRTUAL SOLUTIONS, INC.
GitHub AI Code Copyright Class Action
A proposed class action against GitHub, Inc., Microsoft Corporation, and OpenAI entities, apparently concerning the use of code posted on GitHub to train AI code generators such as GitHub Copilot and OpenAI Codex, allegedly infringing the copyrights of developers who posted code. The Ninth Circuit docket indicates an opinion affirming the lower court's decision; the allegations are not proven and no settlement is indicated.
- Filed
- December 23, 2024
- Represents
- GITHUB, INC., a Delaware corporation, MICROSOFT CORPORATION, a Washington corporation, OPENAI, INC., a Delaware nonprofit corporation, OPENAI, LP, a Delaware limited partnership, OPENAI GP, LLC, a Delaware limited liability company, OPENAI STARTUP FUND GP I, LLC, a Delaware limited liability company, OPENAI STARTUP FUND I, LP, a Delaware limited partnership, OPENAI STARTUP FUND MANAGEMENT, LLC, a Delaware limited liability company, OPENAI OPCO, LLC, OPENAI, LLC, OPENAI GLOBAL, LLC, OAI CORPORATION, OPENAI HOLDINGS, LLC, OPENAI HOLDCO, LLC, OPENAI INVESTMENT, OPENAI STARTUP FUND SPV I, LP, OPENAI STARTUP FUND SPV GP I, LLC
Oracle Privacy Class Action
A proposed class action against Oracle America, Inc., apparently concerning consumer privacy and data practices. The provided docket text from the Ninth Circuit appeal indicates that a lower court judgment was affirmed and a petition for rehearing en banc was denied, but it does not detail the underlying allegations. These are allegations in a putative class action, not proven facts and not a settlement.
- Filed
- December 19, 2024
- Represents
- ORACLE AMERICA, INC., a corporation organized under the laws of the State of Delaware
Doe v. Github Class Action
The docket text does not describe the underlying allegations. It shows an appellate proceeding in a putative class action against Github, Inc. and Microsoft Corporation, with the Ninth Circuit granting a petition for permission to appeal under 28 U.S.C. § 1292(b) and addressing sealing of portions of an answer.
- Filed
- October 8, 2024
- Represents
- OPENAI, INC., a Delaware nonprofit corporation, OPENAI, LP, a Delaware limited partnership, OPENAI GP, LLC, a Delaware limited liability company, OPENAI STARTUP FUND GP I, LLC, a Delaware limited liability company, OPENAI STARTUP FUND I, LP, a Delaware limited partnership, OPENAI STARTUP FUND MANAGEMENT, LLC, a Delaware limited liability company, OPENAI OPCO, LLC, OPENAI, LLC, OPENAI GLOBAL, LLC, OAI CORPORATION, OPENAI HOLDINGS, LLC, OPENAI HOLDCO, LLC, OPENAI INVESTMENT, OPENAI STARTUP FUND SPV I, LP, OPENAI STARTUP FUND SPV GP I, LLC
“Recovery” and “exposure” refer to total disclosed settlement funds in associated cases, not money personally won or lost by an attorney. Settlements generally resolve disputed allegations without a finding that either side won. Data comes from public court dockets and may be incomplete.