Lerner David signs formal collaboration agreement as international intellectual property counsel for Sino-Singapore Guangzhou Knowledge City. Paul Kochanski, a partner, is shown above (far left) with officials of Knowledge City and the Central Chinese Government during the signing ceremony. For more information on Sino-Singapore Guangzhou Knowledge City, click here. About Lerner, David, Littenberg, Krumholz & Mentlik, LLP Lerner David has focused exclusively on intellectual property (IP) law since 1969 including patent, trademark, unfair competition and copyright litigation, risk assessment and due diligence for new products and in mergers & acquisitions, licensing, freedom to operate opinions, portfolio management, procurement and strategic planning.