| Number | Name | Date | Kind |
|---|---|---|---|
| D283407 | Fenne | Apr 1986 | |
| D284748 | Fenne | Jul 1986 | |
| D297222 | Rauch | Aug 1988 | |
| D306409 | Fish | Mar 1990 | |
| D308947 | Downing | Jul 1990 | |
| D339078 | Behlke | Sep 1993 | |
| D346981 | Ratzlaff | May 1994 | |
| 4236822 | Jaretsky et al. | Dec 1980 |
| Entry |
|---|
| ESL Bulletin 2282-SS5, Jan. 1993, Sentrol, Inc., Portland, Oreg. |
| ESL Bulletin 2286-SS5, Jul. 1993, Sentrol, Inc., Portland, Oreg. |