P

Inventor

BALLINGER FORREST H

US10 patents
⚠️ This page may combine multiple inventors who share the name “BALLINGER FORREST H”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HARMON INDUSTRIES

6 patents
US5924652AJul 20, 1999

Island presence detected

HARMON INDUSTRIES21 citations91
US5628479AMay 13, 1997

Vital wheel detector

HARMON INDUSTRIES40 citations91
US4934633AJun 19, 1990

Crossing control unit

HARMON INDUSTRIES22 citations79
US5170970ADec 15, 1992

Method and apparatus for improving rail shunts

HARMON INDUSTRIES17 citations72
US4868538ASep 19, 1989

Random signature island circuit

HARMON INDUSTRIES10 citations65
US5436787AJul 25, 1995

Surge arrestor unit

HARMON INDUSTRIES4 citations61

BALLINGER FORREST H

2 patents
US9019115B2Apr 28, 2015

Warning horn control system, radar system, and method

BALLINGER FORREST H11 citations80
US8764461B2Jul 1, 2014

System for electrically connecting conductor to track member

BALLINGER FORREST H0 citations37

SAB HARMON IND INC

1 patent
US4581700AApr 8, 1986

Processing system for grade crossing warning

SAB HARMON IND INC40 citations85

GEN ELECTRIC

1 patent
US8376286B2Feb 19, 2013

Foreign track current suppression system and method

GEN ELECTRIC0 citations51