Roy G Cline List of directors and agents named Roy G Cline. Found 2 results. ROY G CLINE Registered Address: 5555 HAWTHORNE RD LA PLATA MD 20646 Appointed in one company. Go To Profile ROY G. CLINE Registered Address: 5555 HAWTHORNE ROAD LA PLATA MD 20646 Appointed in one company. Go To Profile