Elizabeth Hanley, Danielle Herritt, Maria Laccotripe Zacharakis, and Cristin Howley Cowles were all formerly with Lahive & Cockfield.
They join a team with additional eight patent professionals including associates, patent agents, and technical specialists.
In all, McCarter & English poached 20 people from Lahive & Cockfield.
McCarter & English has about 400 attorneys in Boston, Hartford, New York City, Newark, Philadelphia, Stamford and Wilmington.