Chan Punzalan is a full-service law firm that provides a wide range of business counsel. We provide practical and efficient legal services catered to the particular needs of each of our clients. Our values of trust, responsiveness, and sound legal advice have helped us to develop strong relationships with our clients so we can best address the legal needs of their businesses. 



Clients and Practice Areas

Our Clients

We counsel new companies, established businesses, individual entrepreneurs, family shops, large enterprises, multi-entity groups, private firms, small corporations, and big partnerships. Our clients operate in a broad spectrum of industries: restaurant, service, retail, travel, manufacturing, creative, advertising, technology, professional, real estate, consulting, and sales. We understand that each client is different. We strive to identify those differences, understand what each client needs, and provide exactly that. No more, no less.

Business Transactions and Contracts

We counsel our clients through business contracts and other transactional issues that arise in the formation or operation of their companies. For some of our clients we serve as outside general counsel, handling most general business matters in our office, and bringing in specialized counsel as needed, such as for securities issues or litigation. In a typical outside general counsel arrangement, we will have weekly scheduled meetings with the client. Those meetings are billed at a lower rate, and in those meetings we review completed work and identify new matters and next steps. Outside of those meetings, we handle all or most of the general business work, such as a letter of intent, or manufacturing agreement, and we work with outside counsel to address the rest, such as funding documents or patent prosecution. Whether we are serving as outside general counsel or on a traditional engagement, our clients frequently call on us for advice, counsel, negotiation, or drafting. We prepare a wide variety of business formation documents, including articles of incorporation and bylaws, articles of organization and operating agreements, and initial meeting minutes or consents. We are also prepared to handle transactions in a wide array of business matters, including letters of intent to lease property or purchase assets, confidentiality and nondisclosure obligations, commercial leases, asset purchases, manufacturing, business services, licensing, technology, creative services, and client services.

Intellectual Property and Business Litigation

We serve as vigorous advocates for our clients in disputes and litigation regarding trade secrets, trademarks, copyrights, technology matters, and other complex business matters. No matter how big or small the dispute, we aggressively represent our client’s interests effectively, skillfully, and efficiently. We handle each litigation matter with thoroughness, a strict attention to detail, and a willingness to work hard to achieve our client’s business goals. Our firm has successfully litigated cases across the country on behalf of a wide spectrum of businesses and individuals.




Billy Chan, Partner

Billy's practice covers business transactions, contracts, and outside general counsel services.

Billy is an active member of the legal community. He is a Past President of both the Asian American Bar Association and the Filipino Bar Association of Northern California. He has served as the Chair of the Solo and Small Firm Committee of the National Asian Pacific American Bar Association, and previously held the Secretary position of that organization. He is a founding and active member of the National Filipino American Lawyers Association.

His pro bono efforts include service as General Counsel of the San Francisco Filipino-American Chamber of Commerce, Secretary and General Counsel of the Hawaiian Chamber of Commerce of Northern California, and General Counsel of the Young Filipino Professionals Association. 

Billy has received awards from the Minority Bar Coalition and the Filipino Bar Association of Northern California for his service to the San Francisco community. He has been recognized in 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, and 2017 as a Northern California Super Lawyer, which is granted to less than 2% of all eligible lawyers.


J.D., University of California, Berkeley School of Law, 2001
B.A., University of California, Los Angeles, 1998

Practice Areas

Business Transactions and Contracts
Outside General Counsel Services

+ Speaking Engagements

  • “The Basics of Trademark Law,” Small Business Administration Oakland
  • “Band Agreements,” California Lawyers for the Arts
  • “Corporate and IP Law for Small Businesses,” Small Business Association Richmond
  • “Entertainment Law 101,” Asian American Music Conference

+ Pro Bono and Community Activities

  • Asian American Bar Association – Past President
  • Filipino Bar Association of Northern California – Past President
  • National Asian Pacific American Bar Association – Solo and Small Firm Committee Chair
  • San Francisco Filipino-American Chamber of Commerce – General Counsel
  • Hawaiian Chamber of Commerce of Northern California – General Counsel and Secretary
  • Young Filipino Professionals Association – General Counsel

+ Awards

  • 2015-2019 Northern California Super Lawyers
  • 2009-2015 Northern California Rising Stars List, Northern California Super Lawyers
  • 2012 Individual of the Decade Award, YFPA
  • 2007 Service Award, Filipino Bar Association of Northern California
  • 2006 Unity Award, Minority Bar Coalition

Mark Punzalan, Partner

Mark's practice focuses on trade secret disputes, trademark matters, complex business litigation, and intellectual property and technology litigation.  Mark has represented U.S. and international clients from a wide variety of industries, and he has successfully prosecuted and defended his clients in complex litigation matters across the country.

Mark has been recognized as a Super Lawyer in Intellectual Property Litigation numerous times (2015, 2016, and 2017), and he is also a two-time recipient of the Minority Bar Coalition’s Unity Award for his contributions to diversity in the legal profession.  Mark continues to be an active member of the legal community, and he currently serves as Chair of the Bar Association of San Francisco’s (BASF) Small Firm Committee, President of the Asian Pacific American Bar Association of Silicon Valley (APABA Silicon Valley), and as Co-Chair of the Judiciary Committee for the Asian American Bar Association’s (AABA).


J.D., Santa Clara University School of Law, 2006
B.A., University of California, Los Angeles, 2001

Practice Areas

Intellectual Property
Commercial Litigation


+ Court Admissions

  • California State Courts
  • Northern District of California
  • Central District of California
  • Southern District of California

+ Speaking Engagements

  • “Artificial Intelligence & Its Impact on the Practice of Law,” Bar Association of San Francisco, October 18, 2017

  • “Trademark Litigation 101: Fighting Disputes Over a Company's Brand Name,” Palo Alto Bar Association, February 22, 2017

  • “Cannabis Laws in California,” Moderator, Bar Association of San Francisco, September 14, 2016

  • “An Evening with Filipino-American Trial Attorneys,” Filipino Bar Association of Northern California (at DLA Piper, San Francisco), April 20, 2016

  • “The Basics of Trademark Law,” San Francisco Law Library, April 6, 2016

  • “The Ethical and Practical Considerations of Co-Counsel Relationships,” State Bar of California, January 29, 2015

  • “Ethical Aspects of Legal Marketing and Promotion,” Santa Clara Law, November 2015.

  • “One Client, Multiple Attorneys: The Ethical and Practical Considerations of Co-Counsel Arrangements,” Kilpatrick Townsend & Stockton LLP, August 2015

  • “Data Privacy Law 101: An Overview of U.S. Data Privacy and Security Laws,” Moderator, Bar Association of San Francisco, August 2015

  • “The Ethics of Co-Counseling,” Santa Clara Law, January 2015

  • “Starting A Law Firm & Choosing The Right Business Entity,” Asian American Bar Association of the Greater Bay Area, August 2014

  • “Trademark Law 101: Protecting a Company's Name and Brand Identity,” Redwood Law Center, May 2013

  • “Trade Secret Protection for Businesses,” Business Networking International, April 2013

  • “Choosing the Right Business Entity: Legal Structures for Doing Business in California,” United Architects of the Philippines, January 2013

  • “Using Technology Effectively in the Courtroom,” Moderator, Bar Association of San Francisco, October 2012

  • “Protecting Your Customers' Personal Information: California's Privacy Requirements for Businesses,” Redwood Law Center, September 2012

  • “New Developments in Section 230 Immunity and the DMCA Safe Harbor - A Discussion of Legal Issues for Experienced Internet Counsel) and Those That Want To Be),” Moderator, Bar Association of San Francisco, January 2011

  • “The DMCA 12 Years Later: Pitting Copyright Protection against Technology Innovation,” Moderator, Bar Association of San Francisco, December 2010

  • “Protecting Your IP: Patents vs. Trade Secrets,” Moderator, Bar Association of San Francisco, October 2008

+ Awards

  • Super Lawyers Magazine “Northern California Super Lawyer,” 2016, 2017, 2018, 2019

  • Super Lawyers Magazine “Northern California Rising Star,” 2015

  • Unity Award, Minority Bar Coalition, 2012, 2017

  • Pro Bono Project Award, Santa Clara University School of Law, 2004, 2005, and 2006

  • Honors Moot Court Board, Committee Chair, Santa Clara University School of Law, 2006

  • Best Brief, Appellate Advocacy, Santa Clara University School of Law, 2005

  • CALI Excellence for the Future Award, Appellate Advocacy, 2005

+ Publications

  • Mark Punzalan and Stephen Stanwood, Protecting Customer Lists as Trade Secrets, California Lawyer (Oct. 17, 2017)

  • Mark Punzalan and Stephen Stanwood, What are the Copyright Risks of Creating a Website Based on Third-Party Content? Tech Law Questions, Santa Clara High Tech Law Journal, May 16, 2016

  • Mark Punzalan, Reducing the Chances of a Trade Secrets Lawsuit: How to Advise Your Business Clients, California State Bar, Big News for Solo and Small Firms, Fall 2015

  • Mark Punzalan and Kevin Bovard, Web Providers and the Communications Decency Act of 1996, The Bar Association of San Francisco Bulletin, July 2009, at 8

  • Mark Punzalan and Dennis Fernandez, Patent Strategies for the Wireless Technology Revolution, The Patent Lawyer, Vol. 1, Issue 2, Oct. 2004, at 10

+ Professional Leadership

  • Asian American Bar Association (AABA): Co-Chair, Judiciary Committee, 2013 – present

  • Asian Pacific American Bar Association of Silicon Valley (APABA-SV): President, 2019 - present; Vice President, External Affairs, 2016 - 2018; Board of Directors, 2015 – present; Partners Committee Co-Chair, 2014 – present; Solo and Small Firm Committee Co-Chair, 2014 – present

  • Bar Association of San Francisco (BASF): Chair, Solo and Small Firm Committee, 2019 - present; Co-Chair, Solo and Small Firm Committee, 2016 - 2018; Solo and Small Firm Committee, MCLE Section Co-Chair, 2014 – 2017; Professional Development Section Co-Chair, Barristers Club, 2012; Intellectual Property/Internet section Co-Chair, 2008-2011

  • Filipino Bar Association of Northern California (FBANC): President, 2011-2012

  • International Trademark Association (ITA): Member, 2017 – Present

  • National Filipino American Lawyers Association (NFALA): Treasurer, 2014 to present

  • Provisors: Executive Committee, Palo Alto 2; Executive Committee, Silicon Valley Lawyers Group

  • San Mateo County Bar Association: Business Litigation Section, Member

  • Santa Clara Law Alumni Association Board Member, 2012 – present


Heidi Kim, Of Counsel

Heidi represents clients in complex commercial litigation matters, including copyright, trademark, and trade secret cases. She has extensive experience with jury trials in federal and state courts, including representing a major medical device company and Fortune 500 companies at trial. Heidi has litigated matters in varied industries such as biotechnology, consumer electronics, e-commerce, and healthcare.

As a former research attorney for California state courts, Heidi brings her unique perspective on California litigation to Chan Punzalan. Heidi also completed an externship with the Honorable William Alsup of the United States District Court, Northern District of California.

Heidi is a member of the Private Defender Panel of San Mateo County, serving as a court-appointed attorney to represent children and parents in the dependency courts. She regularly represents clients in trial as a Private Defender.


J.D., Santa Clara University School of Law, 2006
M.M., Yale University/San Francisco Conservatory of Music, 2002
B.A., Stanford University, 1999


San Francisco

22 Battery Street, Suite 401 | San Francisco, California 94111

Main: 415.986.1812


Silicon Valley

2000 Alameda de las Pulgas, Suite 154 | San Mateo, California 94403

Main: 650.362.4150