| Number | Name | Date | Kind |
|---|---|---|---|
| D330865 | Peletis et al. | Nov 1992 | |
| 4132224 | Randolph | Jan 1979 | |
| 5009233 | Petrohilos | Apr 1991 | |
| 5027828 | Kovacevic et al. | Jul 1991 |
| Entry |
|---|
| Article entitled "Standard Test Method for Rubber Property-Durometer Hardness" from Annual Book of ASTM Standards, vol. 09.02. |
| Article entitled "Instrumentation System for Breast Engorgement Evaluation" by C. D. Ferris. |