Inventor
WITTIG VOLKER
US5 patents
⚠️ This page may combine multiple inventors who share the name “WITTIG VOLKER”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KEJR ENGINEERING INC
4 patentsUS5606139AFeb 25, 1997
Soil sample probe with retaining ring for holding core-catching structure within the probe
KEJR ENGINEERING INC21 citations90
US5635653AJun 3, 1997
Ground water sampling device
KEJR ENGINEERING INC13 citations71
US5612498AMar 18, 1997
Ground water sampling device
KEJR ENGINEERING INC3 citations60
US5553979ASep 10, 1996
Pull cap for attachment to a probe rod
KEJR ENGINEERING INC6 citations60