Inventor

HALVORSON DAVID H

US9 patents

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

WESTINGHOUSE AIR BRAKE TECH CORP

2 patents

US6273521B1Aug 14, 2001

Electronic air brake control system for railcars

WESTINGHOUSE AIR BRAKE TECH CORP98 citations96

US6127747AOct 3, 2000

Method and apparatus for detecting leakage current on a two wire DC or AC power line

WESTINGHOUSE AIR BRAKE TECH CORP11 citations72

WESTINGHOUSE AIR BRAKE CO

2 patents

US5986579ANov 16, 1999

Method and apparatus for determining railcar order in a train

WESTINGHOUSE AIR BRAKE CO76 citations95

US6360998B1Mar 26, 2002

Method and apparatus for controlling trains by determining a direction taken by a train through a railroad switch

WESTINGHOUSE AIR BRAKE CO72 citations92

WABTEC RAILWAY ELECTRONICS

2 patents

US6114974ASep 5, 2000

Method and apparatus for determining railcar order in a train

WABTEC RAILWAY ELECTRONICS57 citations94

US6377215B1Apr 23, 2002

Apparatus and method for detecting railroad locomotive turns by monitoring truck orientation

WABTEC RAILWAY ELECTRONICS65 citations92

MOTIENT SERV INC

1 patent

US6208859B1Mar 27, 2001

Service preemption for mobile terminals in a mobile satellite communications system

MOTIENT SERV INC75 citations94

ROCKWELL COLLINS INC

1 patent

US7639998B1Dec 29, 2009

RF receiver utilizing dynamic power management

ROCKWELL COLLINS INC25 citations91

WABTEC RAILWAY ELECTRONICS INC

1 patent

US6208246B1Mar 27, 2001

Method and apparatus for improving railcar visibility at grade crossings

WABTEC RAILWAY ELECTRONICS INC3 citations61