William D. Dalsen

4.4 (32 reviews )

Boston Massachusetts United States

Intellectual Property Law Patent Law

Recognized in Ones to Watch since 2024

617-526-9600 Website

About William

William D. Dalsen is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law and Patent Law.William D., who practices law in Boston, Massachusetts, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William D. is held by other top lawyers in the same geographic and legal practice area.

William D. Dalsen is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law and Patent Law.

William D., who practices law in Boston, Massachusetts, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William D. is held by other top lawyers in the same geographic and legal practice area.

Practice Areas

Intellectual Property Law

Patent Law

Awards & Recognition

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Reviews

4.4 / 5

32 Reviews

1,042 Profile Views

Deborah Denesik

Feb 05, 2026

So glad I called William D. Dalsen to handle my Intellectual Property Law case in Boston

I've already told all my friends and family about William D. Dalsen. If you need Intellectual Property Law help in Massachusetts, they're the ones to see without any doubt. They are local experts who...

Antoinette Treutel

Feb 05, 2026

A very good experience overall with the entire team at William D. Dalsen's legal practice

I appreciate how William D. Dalsen handled my case. No fluff, just straight to the point and very effective representation for my Intellectual Property Law matter. They are obviously very experienced...

Monica McLaughlin

Feb 05, 2026

Great people who truly care at William D. Dalsen - the best legal team in Massachusetts

Everyone at William D. Dalsen's office in Boston was so nice and helpful. They made a tough situation a lot easier to deal with by being so patient and explaining everything clearly. I never felt like...

Johanna Cummerata

Feb 05, 2026

So glad I called William D. Dalsen to handle my Intellectual Property Law case in Boston

Just wanted to say a huge thanks to William D. Dalsen and the staff. They really went above and beyond for me and my family during a very difficult legal battle. We couldn't have done it without their...

Alicia Bruen

Feb 05, 2026

Would recommend William D. Dalsen for sure to anyone in Boston needing legal help

I wasn't sure who to call for my Intellectual Property Law problem, but I'm so glad I went with William D. Dalsen. They really listened to me and understood my situation. It was such a relief to have...