| Number | Name | Date | Kind |
|---|---|---|---|
| 1223365 | Breitung | Apr 1917 | |
| 1537605 | Hansen | May 1925 | |
| 1577932 | Palese | Mar 1926 | |
| 3896574 | McNaney | Jul 1975 | |
| 4158921 | Stolpen | Jun 1979 | |
| 4314698 | Dolah | Feb 1982 | |
| 4357015 | Santora et al. | Nov 1982 | |
| 4431189 | Wiencek et al. | Feb 1984 | |
| 4467424 | Hedges et al. | Aug 1984 | |
| 4517558 | Davids | May 1985 |
| Number | Date | Country |
|---|---|---|
| 588254 | May 1977 | CHX |
| Entry |
|---|
| Ex parte Gwinn, 112 U.S.P.Q 441. |