Skip to main content

About me

I provide high quality, cost-efficient and prompt legal services in a diverse array of business and civil law matters. Whether you seek to form a new business, negotiate a transaction or manage a dispute, I have broad-based, hands-on experience to assist your legal needs. My experience is forged from tenures at both large and boutique law firms and as in-house and outside corporate counsel to private and public companies in Silicon Valley and throughout California.


Isaac H. Winer is an experienced business lawyer and civil litigator who has practiced law throughout California since 1992.  Mr. Winer’s practice encompasses a broad array of substantive areas, including business formations, funding and governance, commercial contracts, leases and other agreements, technology licensing, civil litigation and ADR across diverse subject matters. Mr. Winer’s clients have included public and private companies in a variety of fields including software, hardware, life science, internet, telecom and health care. He has also represented start-up ventures, entrepreneurs, executives, professionals, investors and other individuals. All of Mr. Winer’s clients share a common thread – they seek experienced, practical and effective advice in the attentive and cost-efficient manner that Mr. Winer practices law. 

Prior to opening his own practice, Mr. Winer managed the litigation practice of a local start-up business law firm, where he also gained significant experience in transactional and corporate matters ranging from business formations to technology licensing. Mr. Winer has also served as corporate counsel at Cypress Semiconductor Corporation, a $4 billion publicly traded company headquartered in Silicon Valley with 5,000 employees throughout the world. At Cypress, Mr. Winer served as a business law generalist, handling a wide range of transactional, corporate and dispute management matters. Prior to working in Silicon Valley, Mr. Winer served as an associate attorney in two large West Coast law firms based in Los Angeles and a boutique practice in the Bay Area.  As a litigator, Isaac's practice focused on complex business litigation in a broad array of business disputes involving issues of contract, tort, real estate, intellectual property and other areas of law. 

Mr. Winer earned his undergraduate degree in 1989 from Stanford University where he graduated with distinction and Phi Beta Kappa honors. He received his law degree from U.C.L.A. School of Law in 1992 where he received an American Jurisprudence Prize Award. Mr. Winer served as an extern to the Hon. William A. Ingram, Chief Judge of the United State District Court for the Northern District of California located in San Jose, California. 

Mr. Winer resides in Palo Alto, California with his wife and two children. He is an active member of the local community, where he volunteers his time for local charitable and social organizations, and enjoys coaching his children’s baseball and basketball league teams. 


Languages spoken: English, Hebrew

Practice areas


  1. Litigation: 50%
    24 years
  2. Business: 50%
    24 years

Attorney endorsements

1 total 

Are you an attorney? Endorse this lawyer

  • Otto Oswald Lee

    I strongly endorse this lawyer for his utmost integrity and professionalism. We first met as opposing counsels, and thereafter I have worked with Isaac for over a decade on various matters. He is one of the very best litigators I have ever worked with - tenacious, thorough and very hardworking. If I were ever sued or deposed, he would be the first person I would ask to defend me.


    Otto Lee Intellectual property Attorney
    Relationship: Worked together on matter

Contact info

Law Office of Isaac H. Winer

2225 E. Bayshore Rd.
Suite 200
Palo Alto, CA, 94303-3621


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
American Jurisprudence AwardAmerican Jurisprudence Society1990
Work experience
TitleCompany nameDuration
PrincipalLaw Office of Isaac H. Winer2000 - Present
Corporate Counsel ManagerCypress Semiconductor Corporation2006 - 2007
Associate AttorneyGrellas & Associates1997 - 2000
Associate AttorneyJeffer Mangels Butler & Marmaro1994 - 1997
Associate AttorneyChristensen, Glaser, Fink, Jacobs, Weil and Shapiro, LLP1992 - 1994
Association namePosition nameDuration
Santa Clara County Bar AssociationMemberN/A
School nameMajorDegreeGraduated
University of California at Los Angeles School of LawLawJD - Juris Doctor1992
Stanford UniversityInt'l. RelationsBA - Bachelor of Arts1989