Halvorson; David H.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Halvorson; David H..The latest application filed is for "rf receiver utilizing dynamic power management".

Company Profile

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Halvorson; David H. - Cedar Rapids IA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
RF receiver utilizing dynamic power management Grant 7,639,998 - Halvorson December 29, 2	2009-12-29
Apparatus and method for detecting railroad locomotive turns by monitoring truck orientation Grant 6,377,215 - Halvorson , et al. April 23, 2	2002-04-23
Method and apparatus for controlling trains by determining a direction taken by a train through a railroad switch Grant 6,360,998 - Halvorson , et al. March 26, 2	2002-03-26
Electronic air brake control system for railcars Grant 6,273,521 - Halvorson , et al. August 14, 2	2001-08-14
Service preemption for mobile terminals in a mobile satellite communications system Grant 6,208,859 - Halvorson March 27, 2	2001-03-27
Method and apparatus for detecting leakage current on a two wire DC or AC power line Grant 6,127,747 - Halvorson October 3, 2	2000-10-03
Method and apparatus for determining railcar order in a train Grant 6,114,974 - Halvorson September 5, 2	2000-09-05
Method and apparatus for determining railcar order in a train Grant 5,986,579 - Halvorson November 16, 1	1999-11-16

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