| Number | Name | Date | Kind |
|---|---|---|---|
| 3543943 | Joy et al. | Jan 1969 | |
| 3633761 | Holliday | Jan 1972 | |
| 3889817 | Berkman | Jul 1975 | |
| 3938665 | Rumble | Feb 1976 | |
| 4228902 | Schulte | Oct 1980 | |
| 4293075 | Veralrud | Oct 1981 | |
| 4358018 | Wolfe | Nov 1982 | |
| 4453785 | Smith | Jun 1984 | |
| 4630737 | King | Dec 1986 | |
| 4655345 | Drake et al. | Apr 1987 | |
| 4702369 | Philosophe | Oct 1987 | |
| 4730739 | Semerau | Mar 1988 | |
| 4762689 | Frey et al. | Aug 1988 | |
| 4819801 | Howard | Apr 1989 | |
| 4872554 | Quernemoen | Oct 1989 | |
| 4911308 | Nylund | Mar 1990 | |
| 4932522 | Milovich | Jul 1990 | |
| 4940147 | Hunt | Jul 1990 | |
| 5054626 | Stempinski | Oct 1991 |
| Entry |
|---|
| Advertisement, Probell Handelsgesellschaft mbH, Hamburg, Germany, Circa Mar. 1991. |