| Number | Name | Date | Kind |
|---|---|---|---|
| 1994225 | Lurcott | Mar 1935 | A |
| 2156489 | Bonetti | May 1939 | A |
| 2474532 | Kitchen | Jun 1949 | A |
| 2481264 | Tulowiecki | Sep 1949 | A |
| 2732481 | King | Jan 1956 | A |
| 4089046 | Cannon | May 1978 | A |
| 4141273 | Austin | Feb 1979 | A |
| 4312490 | Biasini | Jan 1982 | A |
| 4372518 | Biasini | Feb 1983 | A |
| 4471933 | Nelson | Sep 1984 | A |
| 4744536 | Bancalari | May 1988 | A |
| 5149905 | Count | Sep 1992 | A |
| 5445352 | Long | Aug 1995 | A |
| 5467958 | Selvaggio | Nov 1995 | A |
| 5624097 | Potter | Apr 1997 | A |
| 5692719 | Shepherd | Dec 1997 | A |
| 5713553 | Cooper | Feb 1998 | A |
| 5755423 | Michela | May 1998 | A |
| 5833199 | Benting et al. | Nov 1998 | A |
| 5884888 | Grimes et al. | Mar 1999 | A |
| 6017011 | Lee | Jan 2000 | A |
| 6079857 | Mendelsohn et al. | Jun 2000 | A |
| 6237887 | Banner | May 2001 | B1 |
| 6264161 | Waggoner | Jul 2001 | B1 |
| Number | Date | Country |
|---|---|---|
| 26 36 231 | Feb 1978 | DE |
| Entry |
|---|
| PCT WO 96/19931 (Nilsson) Jul. 4, 1996. |