David M. Barkan

Nicholas A. Brown is a lawyer recognized by Best Lawyers in the practice area of Litigation - Patent. Nicholas A. practices law in San Francisco, California Best Lawyers has recognized Nicholas A. Brown since 2017. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Nicholas A. Brown is held by other lawyers.

Barbara I. Antonucci is a lawyer recognized by Best Lawyers in the practice areas of Employment Law - Management and Litigation - Labor and Employment. Barbara I. practices law in San Francisco, California Best Lawyers has recognized Barbara I. Antonucci since 2023. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Barbara I. Antonucci is held by other lawyers.

Amy L. Hespenheide is a lawyer recognized by Best Lawyers in the practice area of Trusts and Estates. Amy L. practices law in San Francisco, California Best Lawyers has recognized Amy L. Hespenheide since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Amy L. Hespenheide is held by other lawyers.

Sophia (Sophie) Castillo counsels domestic and international importers, distributors, national brands, private labels, institutional suppliers, family-owned food processing businesses, and retail grocers on compliance, litigation, and risk avoidance surrounding California’s Proposition 65, as well as other state and national laws related to chemicals and toxics. She advises clients involved in numerous industries across the entire supply chain, including food and beverage, apparel, cook...

Betty H. Chen is a lawyer recognized by Best Lawyers in the practice area of Litigation - Intellectual Property. Betty H. practices law in San Francisco, California Best Lawyers has recognized Betty H. Chen since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Betty H. Chen is held by other lawyers.

Jon has handled bankruptcy and commercial law matters, both simple and complex, since 1993. He maintains a practice primarily representing debtors and creditors in business bankruptcies, commercial restructurings, commercial litigation, and other matters relating to insolvency issues. He has represented chapter 7 trustees, creditors’ committees, secured creditors, and debtors-in-possession in numerous proceedings in a number of different jurisdictions. In addition to appearing often in ...

Matthias Kamber is a partner in the Intellectual Property practice of Paul Hastings and is based in the firm's San Francisco office. Mr. Kamber focuses on litigating intellectual property cases and has tried approximately ten jury and bench trials. In particular, Mr. Kamber has handled patent cases involving internet advertising and telephones, smartphones, and microprocessors throughout the country and before the U.S. International Trade Commission. Mr. Kamber has also handled trade secret, ...

A partner in Lieff Cabraser’s San Francisco office, Sarah R. London is a determined, skilled, and experienced advocate for the injured, employees, and consumers. Sarah leads Lieff Cabraser’s fertility practice , investigating and seeking justice against fertility assistance and genetic testing companies including CooperSurgical, Natera, and Ovation for damaging and destroying hopeful parents’ eggs and embryos. Sarah’s leadership in fertility and women’s health li...

Sandra A. Edwards is a lawyer recognized by Best Lawyers in the practice areas of Commercial Litigation, Litigation - Environmental and Product Liability Litigation - Defendants. Sandra A. practices law in San Francisco, California Best Lawyers has recognized Sandra A. Edwards since 2018. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Sandra A. Edwards is ...

Ronald E. Van Buskirk is a lawyer recognized by Best Lawyers in the practice areas of Environmental Law and Litigation - Environmental. Ronald E. practices law in San Francisco, California Best Lawyers has recognized Ronald E. Van Buskirk since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Ronald E. Van Buskirk is held by other lawyers.