| Number | Name | Date | Kind |
|---|---|---|---|
| 3606846 | Andrews | Sep 1971 | A |
| 4148264 | Caravias | Apr 1979 | A |
| 4273306 | Chang | Jun 1981 | A |
| D268135 | Habro | Mar 1983 | S |
| 4520935 | Churchill | Jun 1985 | A |
| 4842229 | Murray | Jun 1989 | A |
| 4869501 | Anastasakis | Sep 1989 | A |
| RE33645 | Coote | Jul 1991 | E |
| 5141197 | Mackaay | Aug 1992 | A |
| 5193773 | Middleton | Mar 1993 | A |
| 5249397 | Monaco | Oct 1993 | A |
| 5339921 | Faupel | Aug 1994 | A |
| 5558306 | Binford et al. | Sep 1996 | A |
| 5660637 | Dodge | Aug 1997 | A |
| 6240856 | Paskey | Jun 2001 | B1 |
| Entry |
|---|
| U.S. patent application Publicatin US 2002/0007981, filed Apr. 2, 2001 priority to Apr. 3, 2000. Stoneburg. |