| Number | Date | Country | Kind |
|---|---|---|---|
| D2005-033457 | Nov 2005 | JP | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 2185669 | Isenhour | Jan 1940 | A |
| 3451183 | Lespagnol et al. | Jun 1969 | A |
| 3694975 | Pollock | Oct 1972 | A |
| 4356672 | Beckman et al. | Nov 1982 | A |
| 4570390 | Wendt | Feb 1986 | A |
| D315027 | Abbestam et al. | Feb 1991 | S |
| D316444 | Abbestam et al. | Apr 1991 | S |
| 5040347 | Valvis | Aug 1991 | A |
| D373832 | Nomura | Sep 1996 | S |