| Number | Name | Date | Kind |
|---|---|---|---|
| D179206 | Lynn | Nov 1956 | |
| D225161 | Ritchie | Nov 1972 | |
| D244555 | Wiedmann | May 1977 | |
| D310264 | Leoncavallo et al. | Aug 1990 | |
| 4917867 | Jensen et al. | Apr 1990 | |
| 4976923 | Lipsky et al. | Dec 1990 |
| Entry |
|---|
| Cytyc Corporation, ThinPrep.RTM. 2000 Operator's Manual (1995). |