| Number | Date | Country | Kind |
|---|---|---|---|
| PD5726 | Aug 1978 | AUX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 2871536 | Childress | Feb 1959 | |
| 3347411 | Kalata et al. | Oct 1967 | |
| 4102454 | Karevaara | Jul 1978 | |
| 4156483 | Day | May 1979 |
| Number | Date | Country |
|---|---|---|
| 601517 | May 1936 | DE2 |
| 1091832 | Apr 1955 | FRX |
| 1102138 | Oct 1955 | FRX |
| Entry |
|---|
| Australian Design Registration No. 74,452, Published 6/27/78. |