| Number | Name | Date | Kind |
|---|---|---|---|
| 1495389 | Heimerl et al. | May 1924 | |
| 1507707 | Morganstern | Sep 1924 | |
| 2790982 | Schneider | May 1957 | |
| 3027999 | Heroy et al. | Apr 1962 | |
| 3183543 | Worcester | May 1965 | |
| 3608708 | Storandt | Sep 1971 | |
| 3638789 | Tuszewski | Feb 1972 | |
| 3870150 | Hummel | Mar 1975 | |
| 4071921 | Jury | Feb 1978 | |
| 4091491 | Hoffman | May 1978 | |
| 4645251 | Jacobs | Feb 1987 | |
| 4677697 | Hayes | Jul 1987 | |
| 4683592 | Strongwater | Aug 1987 | |
| 4718125 | Derda et al. | Jan 1988 |
| Number | Date | Country |
|---|---|---|
| 899016 | Jun 1962 | GBX |
| 1519450 | Jul 1978 | GBX |
| 1583181 | Jan 1981 | GBX |
| 1596620 | Aug 1981 | GBX |
| 2113977 | Aug 1983 | GBX |
| 2164540 | Mar 1986 | GBX |
| Entry |
|---|
| PCT International Application No. PCT/AU87/00010, Publication date Jul. 16, 1987. |
| PCT International Application No. PCT/US84/02100, Publication date Feb. 27, 1986. |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 206626 | Jun 1988 |