| # | Entity | Status | State |
|---|---|---|---|
| 1 | 14 220 147 935 A.J DUFF & C.E DUFF & C.L DUFF & R.S DUFF |
ABN Cancelled | WA 6391 |
| 2 | 59 543 061 479 J.A DUFF & S.L DUFF |
ABN Active | NSW 2871 |
| 3 | 34 552 507 053 C.T ALLEN & O.C DUFF & C EDIBAM & J.P LEWIS & E LITTON & G.K LO & G.B MCGRATH & D.J MORGAN & B.Y NG & P THYAGARAJAN & S.A WEBB & R WILKINSON & L YAW |
ABN Active | WA 6008 |
| 4 | 82 167 810 539 D.J COX & R.B DANIELS & G.G DUFF & J.A FARRELL & M.K MULQUINEY & S.R MULQUINEY & L SWAN |
ABN Cancelled | NSW 2290 |