Boston-based Nutter McClennen & Fish has added three partners from an intellectual property litigation shop. Joining from Hayes Bostock & Cronin is name partner Paul Cronin. Also coming aboard are Eugene Feher and James Hall.

Cronin, Feher and Hall were among five lawyers who founded Hayes Bostock & Cronin in 2011 after practicing together at Mintz, Levin, Cohn, Ferris, Glovsky and Popeo. With the three attorneys’ move on Monday to 135-lawyer Nutter, the former boutique is no longer in business, Cronin said.

The other two founders of the boutique were Paul Hayes and Dean Bostock. Hayes did not respond to messages seeking comment. Bostock could not be reached for comment.

Midsize Nutter, a general practice firm, provides rate flexibility and a platform for IP litigation, Cronin said.

“At the boutique, we were basically doing just one thing,” he said. “A general practice firm offers a lot more resources.”

Cronin, a former prosecutor in the Middlesex County, Mass., district attorney’s office, handles trademarks, trade secrets and copyright disputes. He also counsels clients on licensing and procurement of IP rights.

Feher, a former aircraft engineer and a licensed pilot, handles legal issues pertaining to Internet technology, electronics and medical and life-sciences devices.

Hall deals with cryptography and computer security matters. He also focuses on preparing technically complicated cases for trial.

Twenty attorneys work in Nutter’s IP group, and about half of them have handled IP litigation. Clients include Lexmark International Inc., Dunkin’ Brands Group Inc. and Husky Injection Molding Systems Ltd.

Adding the three partners is part of Nutter’s plan to expand its IP practice with more litigation services, said William Geary, co-managing partner of the firm.

Nutter’s practices include corporate, labor and employment, litigation real estate and trusts and estate groups. It also has an office in Hyannis, Mass.

Some 4,426 attorneys practicing at NLJ 350 law firms worked in Boston, a 2.2 percent increase from 2011, according to the NLJ 350, The National Law Journal’s annual survey of the nation’s largest law firms. Boston is ranked No. 6 on the NLJ 350 in lawyer headcount among the 25 largest markets in the United States.

Contact Leigh Jones at ljones@alm.com.