| Number | Name | Date | Kind |
|---|---|---|---|
| 4024380 | Gunn | May 1977 | |
| 4218011 | Simjian | Aug 1980 | |
| 4286325 | Dlugos et al. | Aug 1981 | |
| 4471441 | Check, Jr. | Sep 1984 | |
| 4535419 | Dlugos et al. | Aug 1985 | |
| 4622256 | Brych | Nov 1986 | |
| 4835713 | Paster | May 1989 | |
| 4933849 | Connell et al. | Jun 1990 | |
| 4953086 | Fukatsu | Aug 1990 | |
| 5024153 | Bannister et al. | Jun 1991 | |
| 5024282 | Raikes et al. | Jun 1991 | |
| 5280531 | Hunter | Jan 1994 | |
| 5289547 | Ligas et al. | Feb 1994 | |
| 5293319 | DeSha et al. | Mar 1994 | |
| 5307456 | MacKay | Apr 1994 | |
| 5319562 | Whitehouse | Jun 1994 | |
| 5369258 | Sanson et al. | Nov 1994 | |
| 5397125 | Adams | Mar 1995 | |
| 5448641 | Pintsov et al. | Sep 1995 | |
| 5471925 | Heinrich et al. | Dec 1995 | |
| 5539190 | Manduley | Jul 1996 | |
| 5592034 | Felmus et al. | Jan 1997 | |
| 5602742 | Solondz et al. | Feb 1997 | |
| 5742932 | Levitsky | Apr 1998 |
| Number | Date | Country |
|---|---|---|
| 0 336 589 A2 | Oct 1989 | EPX |
| 0 491 392 A2 | Dec 1991 | EPX |
| 3711 211 A1 | Oct 1997 | DEX |
| 1599578 | Oct 1981 | GBX |
| 2230230 | Oct 1990 | GBX |
| Entry |
|---|
| United Kingdom Search Report for Foreign Counterpart Patent Application. |