Beaverton, Oregon
United States
14
2016-09-20
The entities that hold a legal rights for patent applications filed by inventor Severson Frederick E.:
Frederick E. Severson from Beaverton, US has applied for patents for these inventions. The list has both pending applications and granted patents:
Low frequency audio sound effects in model railroading
#2 | 2014-10-09Signaling and remote control train operation
#3 | 2013-08-08Signaling and remote control train operation
#4 | 2013-07-25SIGNALING AND REMOTE CONTROL TRAIN OPERATION
#5 | 2012-08-16Sound systems for model railroad locomotives
#6 | 2012-01-19SIGNALING AND REMOTE CONTROL TRAIN OPERATION
#7 | 2011-09-29Sound systems for model railroad locomotives
#8 | 2010-12-30Signaling and remote control train operation
#9 | 2010-08-10Signaling and remote control train operation
#10 | 2009-01-29Proximity control of on-board processor-based model train sound and control system
#11 | 2009-01-15Sound systems for model railroad locomotives
#12 | 2007-01-04Model railroad control and sound systems
#13 | 2006-01-12Proximity control of on-board processor-based model train sound and control system
#14 | 2005-09-08Sound systems for model railroad locomotives
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