Inventor
GRAVEMAN DONALD F
US7 patents
⚠️ This page may combine multiple inventors who share the name “GRAVEMAN DONALD F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AMERICAN PULVERIZER
5 patentsUS4009836AMar 1, 1977
Material reducing machine
AMERICAN PULVERIZER54 citations89
US3934826AJan 27, 1976
Coal crusher
AMERICAN PULVERIZER21 citations80
US4149677AApr 17, 1979
Reinforced ring hammer
AMERICAN PULVERIZER8 citations72
US4205795AJun 3, 1980
Material handling facility
AMERICAN PULVERIZER13 citations71
US4720051AJan 19, 1988
Hammer-type shredder with air deflector
AMERICAN PULVERIZER11 citations70