| Number | Date | Country | Kind |
|---|---|---|---|
| 2009-006607 | Mar 2009 | JP | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 2385020 | Morin | Sep 1945 | A |
| 2701401 | Dorman | Feb 1955 | A |
| 2720015 | Morin | Oct 1955 | A |
| 2814847 | Zbinden | Dec 1957 | A |
| D265606 | Kasai | Aug 1982 | S |
| 4429438 | Takeshima et al. | Feb 1984 | A |
| D274016 | Kasai | May 1984 | S |
| D284330 | Yoshikawa et al. | Jun 1986 | S |
| D293225 | Hasegawa | Dec 1987 | S |
| D326433 | Takizawa et al. | May 1992 | S |
| D385827 | Covi et al. | Nov 1997 | S |
| 6230373 | Wakai et al. | May 2001 | B1 |
| 7353570 | Himi | Apr 2008 | B2 |
| D586693 | Stenhall | Feb 2009 | S |