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  • Patents
  • Trade Secrets Litigation
  • Intellectual Property
  • U.S. International Trade Commission

Lillian J. Mao Senior Associate Patents, Trade Secrets Litigation

Silicon Valley

Lillian Mao's practice focuses on patent and trade secret litigation involving complex technologies. She has helped clients obtain favorable results at all stages of litigation, including a clean sweep jury verdict for MobileIron in the company's first patent trial.

Lillian has worked on matters for companies including  Oracle, Sandisk, MiTAC, Toshiba, and NVIDIA, covering technologies such as flash memory, GPS, LEDs, image and video compression, and enterprise mobility management. She has practiced in California state court, in multiple federal district courts, before the International Trade Commission, and before the Patent Trial and Appeal Board.



  • Structured Finance
  • Corporate
  • M&A and Private Equity
  • Mortgage Related Securities
  • Equity Capital Markets
  • Fintech

Dora Mao Senior Counsel Structured Finance, Corporate

San Francisco

Dora Mao, senior counsel in the San Francisco office, has extensive experience in complex capital markets transactions, including securitizing personal loans, small business loans, PACE (property assessed clean energy) assessments, commercial mortgage loans, franchisee loans, home equity loans, reverse mortgages, utility receivables, equipment leases, trade receivables, insurance premiums, consumer debt and agency and non-agency residential mortgage loans. Her clients include issuers, underwriters, borrowers and lenders in structured finance transactions.

In addition, she advises financial services clients regularly in connection with Dodd-Frank Act compliance, Regulation AB and other securities law and regulatory compliance matters, warehouse facilities, purchase and sale agreements and template development, servicing rights and repurchase facilities.  She has also advised nonprofits in connection with financing affordable housing and economic development.

In 2012, she was seconded part-time to a finance company client, where she assisted in drafting and implementing compliance policies and procedures and related training materials.

Dora is also experienced in a broad range of securities and commercial transactions, including private and public offerings of equity and debt, mergers and acquisitions, and commercial loan origination. She has represented both issuers and investors in a wide variety of equity and debt issuances.    

Dora was Partner-in-Charge of the San Francisco office of the firm from 2000 through 2003 and serves on the firm’s Opinion Committee and Professional Development Committee.   She served on the Board of Directors of the Girl Scouts of Northern California from 2004 through 2012 and the Board of Trustees of San Francisco University High School from 2007 through 2014.



  • Energy
  • Project Finance
  • Renewable Energy
  • Infrastructure
  • International Trade & Compliance

Xiaowan Mao Associate Energy, Project Finance

San Francisco

Xiaowan’s practice focuses on project development, acquisition and financing in the renewable energy sector.

Xiaowan has both Chinese language and culture backgrounds, having received her legal education in China and the United States. She is interested in legal issues related to cross-border trade (especially regarding solar industry tariffs) and transactions, renewable energy, data privacy and general corporate practice. During law school, Xiaowan held multiple legal intern positions in US and China, including at a globalsemicionductor company, a global insurance company’s Chinese subsidiary, a China-based law firm, and a global law firm. Prior to joining Orrick, Xiaowan worked at another national law firm where she focused on renewable energy project development and M&A.