Inventor

GELHAR DAVID J

US3 patents

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

ROTO MIX LLC

2 patents

US7172137B2Feb 6, 2007

Material spreader and method for using same

ROTO MIX LLC12 citations78

US7191965B2Mar 20, 2007

Material spreader and method for using same

ROTO MIX LLC9 citations68

WIETGREFE GARY W

1 patent

USD549755SAug 28, 2007

Product distributor

WIETGREFE GARY W12 citations74