Assignee
DIFCO INC
US5 patents
Top patents by PatentIndex Score
US5359942ANov 1, 1994
Remote control positioning system for controlling hopper doors
DIFCO INC82 citations94
US5261333ANov 16, 1993
Automated ballast door mechanism
DIFCO INC46 citations91
US5606916AMar 4, 1997
Hopper door operating mechanism
DIFCO INC13 citations71
US5579593ADec 3, 1996
Railroad ballast spreading (plow) system
DIFCO INC12 citations71
US5402731AApr 4, 1995
Actuator assembly
DIFCO INC5 citations61