| Number | Date | Country | Kind |
|---|---|---|---|
| 92/9961 | Dec 1992 | ZAX | |
| 93/1549 | Mar 1993 | ZAX | |
| 93/6560 | Sep 1993 | ZAX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 1265159 | Alexander | May 1918 | |
| 2616612 | Guttman | Nov 1952 | |
| 2708068 | Guttman | May 1955 | |
| 4379573 | Lomeli et al. | Apr 1983 | |
| 4505770 | Larimore | Mar 1985 | |
| 4635965 | Vogt | Jan 1987 | |
| 4890862 | Bucholz | Jan 1990 | |
| 4910058 | Jameson | Mar 1990 | |
| 4982894 | Schmidt | Jan 1991 | |
| 4986868 | Schmidt | Jan 1991 | |
| 5131686 | Carlson | Jul 1992 | |
| 5149587 | Hill et al. | Sep 1992 | |
| 5172938 | Schmidt | Dec 1992 |
| Number | Date | Country |
|---|---|---|
| 0222424 | Oct 1986 | EPX |
| 8001262 | Feb 1980 | NLX |
| 1569850 | Jun 1980 | GBX |
| 2084077 | Apr 1982 | GBX |
| 2235412 | Jul 1989 | GBX |
| 2221188 | Jan 1990 | GBX |
| 2254045 | Sep 1992 | GBX |
| 2257657 | Jan 1993 | GBX |
| WO9205036 | Apr 1992 | WOX |
| Entry |
|---|
| Abstract of German Gebrauchsmuster 8435729 dated Mar. 21, 1985, one page. |