JOHN B. LONG Co (JBLCo) is a world class supplier of innovative sampling systems & components, mine transportation & safety equipment, and related services to the bulk materials and mining industries. COMPANY NEWS! NEW PRODUCTS & OPTIONS BULK MATERIAL SAMPLING PRODUCTS UNDERGROUND MINING PRODUCTS TRADE SHOW SCHEDULE INTERNATIONAL ACTIVITY ABOUT US JOHN B. LONG Co Post Office Box 50608 Knoxville, ...