A little over three years after starting a patent litigation practice at Radnor, Pa.-based class action firm Kessler Topaz Meltzer & Check, partner Michael J. Bonella has left to join Philadelphia-based intellectual property boutique Condo Roccia Koptiw as a partner.

Bonella will be joined at Condo Roccia by Kessler Topaz associate Jenna Pellecchia, who is joining as an associate.