| Number | Name | Date | Kind |
|---|---|---|---|
| D286570 | Williams | Nov 1986 | |
| D297054 | Williams | Aug 1988 | |
| D300561 | Asa et al. | Apr 1989 | |
| 4721680 | Jeffs et al. | Jan 1988 | |
| 5192511 | Roach | Mar 1993 | |
| 5223225 | Gautsch | Jun 1993 | |
| 5403553 | Heinonen | Apr 1995 |
| Entry |
|---|
| The Fisher Catalog "Ultra Micro Tips" Pipetters p. 1242 @1993/1994. |