| Number | Name | Date | Kind |
|---|---|---|---|
| D158108 | Ljunggren | Apr 1950 | S |
| D160469 | Brenner | Oct 1950 | S |
| D261006 | Wall et al. | Sep 1981 | S |
| 4432281 | Wall et al. | Feb 1984 | A |
| 4852489 | Wall et al. | Aug 1989 | A |
| D326865 | Satoh | Jun 1992 | S |
| D367290 | Sculler et al. | Feb 1996 | S |
| 5649485 | Dour et al. | Jul 1997 | A |
| D387799 | Daw et al. | Dec 1997 | S |
| D417232 | Harden | Nov 1999 | S |
| D425546 | Lee | May 2000 | S |
| D444808 | Dour et al. | Jul 2001 | S |
| D451945 | MacNeil et al. | Dec 2001 | S |
| D452262 | MacNeil et al. | Dec 2001 | S |
| Number | Date | Country |
|---|---|---|
| 2035907 | Jun 1994 | GB |
| 2102516 | Jul 2001 | GB |
| Entry |
|---|
| M&R Marking Systems Catalog, 2002 (selected pages). |