| Number | Date | Country | Kind |
|---|---|---|---|
| D2007-026497 | Sep 2007 | JP | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 2501107 | Volkmann | Mar 1950 | A |
| 2933145 | Di Mattia | Apr 1960 | A |
| 4588867 | Konomi | May 1986 | A |
| 4597469 | Nagashima | Jul 1986 | A |
| D300133 | Daidoh et al. | Mar 1989 | S |
| D310081 | Daido et al. | Aug 1990 | S |
| D316551 | Ichikawa | Apr 1991 | S |
| D331057 | Isonaga | Nov 1992 | S |
| D331408 | Ellermeier | Dec 1992 | S |
| D351598 | Nakamura | Oct 1994 | S |
| 5363444 | Norris | Nov 1994 | A |
| D357921 | Ming-Chin | May 1995 | S |
| D368716 | Shudo | Apr 1996 | S |
| D369349 | Hayashi | Apr 1996 | S |
| D377796 | Hayashi | Feb 1997 | S |
| D399206 | Yasutomi et al. | Oct 1998 | S |
| 5829062 | Magidson | Nov 1998 | A |
| D402661 | Hayashi | Dec 1998 | S |
| 6056082 | Lindgren et al. | May 2000 | A |
| D431553 | Suzuki | Oct 2000 | S |
| D457515 | Masamitsu et al. | May 2002 | S |
| D471176 | Suzuki | Mar 2003 | S |
| D474171 | Suzuki | May 2003 | S |
| D485548 | Obata | Jan 2004 | S |
| D487077 | Obata | Feb 2004 | S |
| 6741719 | Orten | May 2004 | B1 |
| D492943 | Komiyama | Jul 2004 | S |
| D510085 | Suzuki | Sep 2005 | S |
| D533867 | Koizumi | Dec 2006 | S |
| D533868 | Koizumi | Dec 2006 | S |
| D539268 | Suzuki | Mar 2007 | S |
| D560206 | Hermansen | Jan 2008 | S |
| D566099 | Komiyama | Apr 2008 | S |