Assignee
HARMON INDUSTRIES
US20 patents
Top patents by PatentIndex Score
US5452870ASep 26, 1995
Fixed data transmission system for controlling train movement
HARMON INDUSTRIES130 citations96
US5340062AAug 23, 1994
Train control system integrating dynamic and fixed data
HARMON INDUSTRIES122 citations96
US5533695AJul 9, 1996
Incremental train control system
HARMON INDUSTRIES215 citations95
US5769364AJun 23, 1998
Coded track circuit with diagnostic capability
HARMON INDUSTRIES47 citations92
US5924652AJul 20, 1999
Island presence detected
HARMON INDUSTRIES21 citations91
US5628479AMay 13, 1997
Vital wheel detector
HARMON INDUSTRIES40 citations91
US6392553B1May 21, 2002
Signal interface module
HARMON INDUSTRIES27 citations90
US5628478AMay 13, 1997
Cab signal pickup system with motor noise reduction
HARMON INDUSTRIES21 citations90
US5586736ADec 24, 1996
Cab signal sensor with noise suppression
HARMON INDUSTRIES43 citations90
US5149025ASep 22, 1992
Detection of overheated railroad wheel and axle components
HARMON INDUSTRIES51 citations87
US4928910AMay 29, 1990
Detection of overheated railroad wheel and axle components
HARMON INDUSTRIES23 citations87
US6064315AMay 16, 2000
Zero speed transducer
HARMON INDUSTRIES21 citations86
US5060890AOct 29, 1991
Detection of overheated railroad wheel and axle components
HARMON INDUSTRIES51 citations85
US4934633AJun 19, 1990
Crossing control unit
HARMON INDUSTRIES22 citations79
US5170970ADec 15, 1992
Method and apparatus for improving rail shunts
HARMON INDUSTRIES17 citations72
US3964704AJun 22, 1976
Operating mechanism for railroad crossing gate
HARMON INDUSTRIES30 citations70
US4868538ASep 19, 1989
Random signature island circuit
HARMON INDUSTRIES10 citations65
US5436787AJul 25, 1995
Surge arrestor unit
HARMON INDUSTRIES4 citations61
US4026505AMay 31, 1977
Variable high pass coupler
HARMON INDUSTRIES4 citations61
US5507434AApr 16, 1996
Clamp mount for concrete ties
HARMON INDUSTRIES13 citations59