| Number | Name | Date | Kind |
|---|---|---|---|
| 1977466 | Bohnke | Oct 1934 | |
| 2034116 | Palen | Mar 1936 | |
| 2476102 | Lobell | Jul 1949 | |
| 3564662 | Dold | Feb 1971 | |
| 3645382 | Abrams | Feb 1972 | |
| 3727658 | Eldridge, Jr. | Apr 1973 | |
| 3861521 | Burtz | Jan 1975 | |
| 3872965 | Taub | Mar 1975 | |
| 4000811 | Hardison et al. | Jan 1977 | |
| 4063638 | Marwood | Dec 1977 | |
| 4210239 | Takahashi | Jul 1980 | |
| 4225038 | Egly | Sep 1980 | |
| 4249656 | Cerwin et al. | Feb 1981 | |
| 4253563 | Komarnycky | Mar 1981 | |
| 4260056 | Horvath et al. | Apr 1981 | |
| 4261463 | Shave | Apr 1981 | |
| 4501363 | Isbey, Jr. | Feb 1985 | |
| 4651872 | Joyce | Mar 1987 | |
| 4886160 | Klingerman | Dec 1989 | |
| 4886165 | Annett | Dec 1989 | |
| 4936314 | Kasai et al. | Jun 1990 | |
| 4947984 | Kaufman et al. | Aug 1990 |
| Number | Date | Country |
|---|---|---|
| 446782 | May 1936 | GBX |
| Entry |
|---|
| Point of View by Ethicon, Inc., vol. 25, No. 1, 1988. |