William Dalsen

Photo of William Dalsen

Will Dalsen is an associate in the Litigation Department, practicing in the Patent Law, Intellectual Property, and Asset Management Litigation Groups.

Will practices in the area of complex intellectual property disputes, with a primary focus on patent infringement matters. He has litigated several high-profile patent infringement cases for some of the world's leading technology companies, including Panasonic, Philips, Sony, Mitsubishi and Zenith Electronics.

His practice also includes complex commercial and securities litigation matters, in particular those involving private equity, venture capital and hedge funds. He has represented public and private corporations in contractual disputes, business tort cases, and government investigations. In addition, he advises funds, fund sponsors, investment advisers, and institutional and individual investors.

Latest Articles

An increasingly sophisticated and active OCIE division, innovative market disruptors, a maturing credit cycle, and a philosophical change in how the private fund industry views and utilizes litigation are likely to lead to increased regulatory scrutiny and litigation risk for advisers (and their funds) in 2019.  With that backdrop, we are pleased to present our Top Ten Regulatory and Litigation Risks for Private Funds in 2019.…
Last month, Proskauer filed an amicus brief on behalf of Sanctuary for Families — a leading non-profit organization advocating for victims of domestic violence and sex trafficking —specifically to advocate for allowing criminal prosecutions based on lawfully recorded telephone calls that abusers in pretrial detention use to coerce victims not to testify. According to some reports, up to 80% of victims of domestic abuse and sex trafficking recant their testimony of the abuse and refuse…
Last week, in Martin v. Gross, Chief Judge Patti B. Saris of the U.S. District Court for the District of Massachusetts granted summary judgment in favor of our clients, finding the Massachusetts Wiretap Statute (Mass. Gen. L. ch. 272, § 99) unconstitutional when applied to secret recordings of government officials performing their duties in public.  The decision is significant for its clarification of protections under the First Amendment. The Massachusetts Wiretap Statute makes it…
Potential disputes involving unicorns have been a hot topic for the last several years.  We predicted that would continue this year in in our webinar and related blog post: The Top Ten Regulatory and Litigation Risks for Private Funds in 2018.  In April, the Regional Director of the SEC’s San Francisco office, Jina Choi, confirmed this in her comments during a San Francisco Federal Bar Association panel.  Specifically, Ms. Choi discussed the SEC’s…
With the public equity markets at an all-time high and private equity fund raising setting new records, it might seem counterintuitive to forecast litigation and regulatory risks.  The opposite is true.  Disputes typically follow capital, and the steeper the growth curve, the greater the risk of litigation and regulatory scrutiny.  With that backdrop, we are pleased to present our Top Ten Regulatory and Litigation Risks for Private Funds in 2018. 1. Regulatory Scrutiny Involving Cryptocurrencies…
A team of Proskauer attorneys, on behalf of 12 leading non-profit organizations specializing in advocacy for victims of domestic violence, drafted an amicus brief in support of a mother seeking to uphold a district court’s determination that her child would be subject to a grave risk of harm were he to be returned to his country of residence with his father.  The respondent and her minor child, K.D., fled French St. Martin to the United…
The recent IPOs of Snap, Inc. and Blue Apron indicate that while the IPO pipeline continues to flow, there may be a cautionary tale for “unicorns” – venture-backed companies with estimated valuations in excess of $1 billion. After Snap went public in March, it posted a $2.2 billion loss in its first quarter, yielding a 20% same-day drop in stock price that erased much of the company’s gains since its IPO. A snapshot of Snap’s…
A recent decision from the District of Connecticut is part of a series of copyright cases where a plaintiff, unable to identify the accused infringer except by the Internet Protocol (or “IP) address used at the time of the alleged infringement, has sought and received pre-service leave to serve a subpoena upon the Internet Service Provider (or “ISP”) associated with that IP address to enable service of process. But, as described below, the nature of the accused…
Private investment funds and advisers are likely to face new regulatory challenges and increased litigation risks in 2017, not only because of a change in the administration, but also because many advisers have not corrected and aligned past practices with current regulatory guidance.  In this post, we have highlighted ten areas that should be on the top of every private fund adviser’s list for 2017 – and how to assess and manage the associated risks.…
The Securities and Exchange Commission today announced its enforcement results for fiscal year 2016, reaching new highs in the number of actions filed and money ordered forfeited through disgorgement and penalties.  The SEC noted that it brought the most ever cases involving investment advisers or investment companies, including 8 enforcement actions related to private equity advisers, an area that has clearly been a priority for the Commission over the past year, and a record 21 cases…