Inventor

DE GRAAFF WILLEM T

US3 patents

⚠️ This page may combine multiple inventors who share the name “DE GRAAFF WILLEM T”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

GEN ELECTRIC

2 patents

US6326576B1Dec 4, 2001

Method and apparatus for electrical discharge machining

GEN ELECTRIC27 citations86

US6231035B1May 15, 2001

Workpiece fixture

GEN ELECTRIC6 citations57

COLEMAN FRIZZELL INC

1 patent

US4868961ASep 26, 1989

Apparatus for engraving vein cuts

COLEMAN FRIZZELL INC6 citations49