|
| US5270100 | 5. Febr. 1992 | 14. Dez. 1993 | | Phosphorescent coloring method |
| US5457507 | 13. Sept. 1994 | 10. Okt. 1995 | | Self-contained electroluminescent back-lit clap board/slate |
| US5976411 | 16. Dez. 1997 | 2. Nov. 1999 | M.A. HannaColor | Laser marking of phosphorescent plastic articles |
| US6118096 | 28. Mai 1999 | 12. Sept. 2000 | M. A. HannaColor, a division of M. A. Hanna Company | Laser marking of phosphorescent plastic articles |
| US6168853 | 27. Mai 1999 | 2. Jan. 2001 | M.A.HannaColor, a division of M.A. Hanna Company | Laser marking of phosphorescent plastic articles |
| US6375864 | 10. Nov. 1998 | 23. Apr. 2002 | M.A. HannaColor, a division of M.A. Hanna Company | Daylight/nightglow colored phosphorescent plastic compositions and articles |
