| Number | Name | Date | Kind |
|---|---|---|---|
| 1571475 | Guenther | Feb 1926 | |
| 3045900 | Zekendorf | Jul 1962 | |
| 4050493 | Cho | Sep 1977 | |
| 4522288 | Wickman et al. | Jun 1986 | |
| 4589546 | Sunderland | May 1986 | |
| 4700634 | Mills et al. | Oct 1987 | |
| 4796735 | Horiuchi | Jan 1989 | |
| 4960233 | Morchower | Oct 1990 | |
| 5010459 | Taylor et al. | Apr 1991 | |
| 5115893 | Terkildsen | May 1992 |
| Entry |
|---|
| Lighting Dimensions, Apr. 1993, Pulsar Light advertisement, p. 38. |
| Lighting Dimensions, Apr. 1973, Electronics Diversified advertisement, p. 73. |
| Lighting Dimensions, Apr. 1993, Leprecon advertisement, p. 76. |
| WDR, vol. 4 Issue 5 1994, Laser Systems advertisement, p. 107. |