| 3036814 | Inlet valve assembly | |||
| 2861586 | Connector for vacuum cleaners | |||
| 2851286 | Inlet valve assembly for central vacuum systems | |||
| 2825921 | Central vacuum cleaning system | |||
| 2725113 | Combined air conditioning and vacuum cleaning apparatus for buildings | |||
| 2505376 | Vacuum relief valve | |||
| 2481018 | Relief valve | |||
| 1853203 | Outlet box support | |||
| 1741899 | Combined eighth bend and clean-out pipe fitting | |||
| 1717471 | Outlet fixture for pneumatic systems | |||
| 1557509 | Sanitary tee | |||
| 1255175 | N/A | |||
| 1175523 | N/A | |||
| 1037083 | N/A | |||
| 1005005 | N/A | |||
| 0980418 | N/A |