About Us Hamilton NJ Personal Injury Lawyers.The lawyers of Kalavruzos, Mumola, Hartman, Lento & Duff, LLC, come from a variety of legal backgrounds, and bring a wealth of knowledge to every case. This not only gives each of our clients a unique advantage, it’s a testament to outstanding service and commitment. Our attorneys have owned and run multiple businesses, have 5-star Avvo ratings, were assistant prosecutors, and have represented insurance companies – providing us with valuable insight into how best to handle our cases.