Filed: September 2, 1960 Air Operated Pneumatic Fluent Material Conveyor Systems Other than Vacuum Cleaners Including Hopper Feeders, Feed Bins,… Owned by:VAC-U-MAX Serial Number:72103883
Filed: July 25, 1979 Bin Activator, Material Bulkbreaking and Hopper Evacuation Systems for Injecting Multiple Air Bursts Directly into a Compacted… Owned by:VAC-U-MAX Serial Number:73224713
Filed: September 18, 1995 outlet caps made primarily of metal and intended for use at the end of a tube of a vacuum conduit system Owned by:VAC-U-MAX Serial Number:74730865