Inventor

WECH MICHAEL

US2 patents

Patents

2 patents

US6164924ADec 26, 2000

Piston and drive assembly for use in a pump

OIL RITE CORP42 citations89

US6071097AJun 6, 2000

Single-piece piston for use in a pneumatically-activated pump

OIL RITE CORP14 citations70