| Number | Name | Date | Kind |
|---|---|---|---|
| 3544253 | Bloom et al. | Dec 1970 | A |
| 4095348 | Kramer | Jun 1978 | A |
| 4250627 | Järvenp{umlaut over (aa)} | Feb 1981 | A |
| 4438568 | Kramer et al. | Mar 1984 | A |
| 4668100 | Murakami et al. | May 1987 | A |
| 4733383 | Waterbury | Mar 1988 | A |
| D308488 | Iden | Jun 1990 | S |
| D310787 | Iden | Sep 1990 | S |
| D310970 | Iden | Oct 1990 | S |
| D316983 | Houlihan | May 1991 | S |
| D360369 | Wong et al. | Jul 1995 | S |
| 5438555 | Kim | Aug 1995 | A |
| 5600611 | Kamens | Feb 1997 | A |
| D386097 | Lindman et al. | Nov 1997 | S |
| D386983 | Houlihan | Dec 1997 | S |
| D389069 | Steinhagen et al. | Jan 1998 | S |
| 5734625 | Kondo | Mar 1998 | A |
| D400450 | Cummings et al. | Nov 1998 | S |
| D401168 | Wallberg | Nov 1998 | S |
| 5845235 | Luukkanen et al. | Dec 1998 | A |
| 6011755 | Mulhall et al. | Jan 2000 | A |
| 6144619 | Reisman | Nov 2000 | A |
| D442496 | Haupt | May 2001 | S |
| Number | Date | Country |
|---|---|---|
| 351225 | Dec 1960 | CH |