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| Number | Title | Issue Date |
| 6007314 | Downhole pump with standing valve assembly which guides the ball off-center Disclosed is a standing valve containing a ball, in which during operation, the ball is moved by ball guides to a position off center and yet not impinged against the valve, and in which unequal fluid flow areas are created around the horizontal circumfer... | 12/28/1999 |
| 5893708 | Rotating piston for ball and seat valve assembly and downhole pump utilizing said valve assembly Disclosed is an assembly for unseating a seated traveling valve ball, and pumps utilizing such an assembly. The assembly generally includes a tubular member having therein a piston with an actuator for engaging the ball. Mechanical advantage is provided e... | 04/13/1999 |
| 5857219 | Collapsible hat for maintaining a wearers hairstyle with structure to reduce wrinkling A hat having elongated support members extending from the exterior of the crown of the hat, for supporting the hat upon the head of the wearer, to prevent the hat from causing any undue adverse affect to the wearer's hair style. An alternative embodiment ... | 01/12/1999 |
