| Patent | Date |
|---|
Signaling and remote control train operation
Grant 9,511,303 - Severson December 6, 2 | 2016-12-06 |
Low frequency audio sound effects in model railroading
Grant 9,449,590 - Severson , et al. September 20, 2 | 2016-09-20 |
Signaling And Remote Control Train Operation
App 20140299715 - Severson; Frederick E. | 2014-10-09 |
Signaling and remote control train operation
Grant 8,701,562 - Severson April 22, 2 | 2014-04-22 |
Signaling And Remote Control Train Operation
App 20130203318 - Severson; Frederick E. | 2013-08-08 |
Signaling And Remote Control Train Operation
App 20130190952 - Severson; Frederick E. | 2013-07-25 |
Sound systems for model railroad locomotives
Grant 8,408,143 - Severson April 2, 2 | 2013-04-02 |
Sound Systems For Model Railroad Locomotives
App 20120204422 - Severson; Frederick E. | 2012-08-16 |
Sound systems for model railroad locomotives
Grant 8,166,887 - Severson May 1, 2 | 2012-05-01 |
Signaling And Remote Control Train Operation
App 20120016542 - Severson; Frederick E. | 2012-01-19 |
Signaling and remote control train operation
Grant 8,070,108 - Severson December 6, 2 | 2011-12-06 |
Sound Systems For Model Railroad Locomotives
App 20110235820 - Severson; Frederick E. | 2011-09-29 |
Sound systems for model railroad locomotives
Grant 7,954,435 - Severson June 7, 2 | 2011-06-07 |
Signaling techniques for DC track powered model railroads
Grant RE42,284 - Severson , et al. April 12, 2 | 2011-04-12 |
Signaling And Remote Control Train Operation
App 20100330875 - Severson; Frederick E. | 2010-12-30 |
Proximity control of on-board processor-based model train sound and control system
Grant 7,859,424 - Severson December 28, 2 | 2010-12-28 |
Signaling and remote control train operation
Grant 7,770,847 - Severson August 10, 2 | 2010-08-10 |
Proximity Control Of On-board Processor-based Model Train Sound And Control System
App 20090029626 - Severson; Frederick E. | 2009-01-29 |
Sound Systems For Model Railroad Locomotives
App 20090016556 - Severson; Frederick E. | 2009-01-15 |
Sound systems for model railroad locomotives
Grant 7,451,708 - Severson November 18, 2 | 2008-11-18 |
Proximity control of on-board processor-based model train sound and control system
Grant 7,429,931 - Severson September 30, 2 | 2008-09-30 |
Model railroad control and sound systems
App 20070001058 - Severson; Frederick E. | 2007-01-04 |
Proximity control of on-board processor-based model train sound and control system
App 20060009117 - Severson; Frederick E. | 2006-01-12 |
Sound systems for model railroad locomotives
App 20050194204 - Severson, Frederick E. | 2005-09-08 |
Continuous sound by concatenating selected digital sound segments
Grant 6,230,140 - Severson , et al. May 8, 2 | 2001-05-08 |
Model train locomotive with doppler shifting of sound effects
Grant 5,896,017 - Severson , et al. April 20, 1 | 1999-04-20 |
Command control for model railroading using AC track power signals for encoding pseudo-digital signals
Grant 5,773,939 - Severson , et al. June 30, 1 | 1998-06-30 |
Method of generating continuous non-looped sound effects
Grant 5,633,985 - Severson , et al. May 27, 1 | 1997-05-27 |
Complex switch turn-out arrangements using proximity selection
Grant 5,590,856 - Quinn , et al. January 7, 1 | 1997-01-07 |
Model railroad operation using proximity selection
Grant 5,492,290 - Quinn , et al. February 20, 1 | 1996-02-20 |
Signaling techniques for DC track powered model railroads
Grant 5,448,142 - Severson , et al. September 5, 1 | 1995-09-05 |
Automatic initialization in a model railroad motor control system
Grant 5,394,068 - Severson , et al. February 28, 1 | 1995-02-28 |
Model railroad cattle car sound effects
Grant 5,267,318 - Severson , et al. November 30, 1 | 1993-11-30 |
Model railroad reversing motor control system
Grant 5,184,048 - Severson , et al. February 2, 1 | 1993-02-02 |
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