| Number | Name | Date | Kind |
|---|---|---|---|
| 2639168 | Coppock | May 1953 | |
| 3092400 | Smith | Jun 1963 | |
| 3870223 | Wyant | Mar 1975 | |
| 4629349 | Pitts | Dec 1986 | |
| 5030027 | Bachrach et al. | Jul 1991 |
| Number | Date | Country |
|---|---|---|
| 175812 | Aug 1961 | SEX |
| 200241 | Dec 1965 | SEX |
| 7801725 | Apr 1979 | SEX |
| Entry |
|---|
| The 1989 Jacobs Gardner Office Products Catalog, p. 783, items A-D., 1989. |