Inventor
CHRISTENSEN ROLAND J
US35 patents
⚠️ This page may combine multiple inventors who share the name “CHRISTENSEN ROLAND J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FREEDOM INNOVATIONS LLC
11 patentsUS7686848B2Mar 30, 2010
Prosthetic foot with energy transfer
FREEDOM INNOVATIONS LLC59 citations98
US7520904B2Apr 21, 2009
Prosthetic foot with an adjustable ankle and method
FREEDOM INNOVATIONS LLC96 citations98
US7462201B2Dec 9, 2008
Prosthetic foot with an adjustable ankle and method
FREEDOM INNOVATIONS LLC58 citations98
US8034121B2Oct 11, 2011
Prosthetic foot with two leaf-springs joined at heel and toe
FREEDOM INNOVATIONS LLC25 citations92
US7740602B2Jun 22, 2010
Ankle foot orthotic brace
FREEDOM INNOVATIONS LLC23 citations92
US7618464B2Nov 17, 2009
Prosthetic foot with variable medial/lateral stiffness
FREEDOM INNOVATIONS LLC50 citations92
US7572299B2Aug 11, 2009
Prosthetic foot with energy transfer
FREEDOM INNOVATIONS LLC26 citations92
US7419509B2Sep 2, 2008
Prosthetic foot with a resilient ankle
FREEDOM INNOVATIONS LLC38 citations92
US7824446B2Nov 2, 2010
Prosthetic foot with longer upper forefoot and shorter lower forefoot
FREEDOM INNOVATIONS LLC29 citations89
US7727285B2Jun 1, 2010
Prosthetic foot with variable medial/lateral stiffness
FREEDOM INNOVATIONS LLC41 citations89
US7794506B2Sep 14, 2010
Multi-axial prosthetic ankle
FREEDOM INNOVATIONS LLC11 citations84
CHRISTENSEN ROLAND J
7 patentsUS6663673B2Dec 16, 2003
Prosthetic foot with energy transfer medium including variable viscosity fluid
CHRISTENSEN ROLAND J138 citations98
US6197068B1Mar 6, 2001
Prosthetic foot simulating toe rotation
CHRISTENSEN ROLAND J95 citations97
US6120547ASep 19, 2000
Enhanced prosthetic foot structure with ankle reinforcement
CHRISTENSEN ROLAND J65 citations96
US6702858B2Mar 9, 2004
Liner for prosthetic socket with variable viscosity fluid
CHRISTENSEN ROLAND J51 citations92
US5657568AAug 19, 1997
Composite/metallic gun barrel having a differing, restrictive coefficient of thermal expansion
CHRISTENSEN ROLAND J33 citations92
US5360394ANov 1, 1994
Rigid joint support brace sizing means and method
CHRISTENSEN ROLAND J41 citations92
US8500825B2Aug 6, 2013
Prosthetic foot with floating forefoot keel
CHRISTENSEN ROLAND J25 citations86
ROLAND J CHRISTENSEN AS OPERAT
5 patentsUS7172630B2Feb 6, 2007
Prosthetic foot with cam
ROLAND J CHRISTENSEN AS OPERAT62 citations97
US6966933B2Nov 22, 2005
Prosthetic foot with an adjustable ankle and method
ROLAND J CHRISTENSEN AS OPERAT84 citations97
US6875242B2Apr 5, 2005
Prosthetic foot with energy transfer medium including variable viscosity fluid
ROLAND J CHRISTENSEN AS OPERAT44 citations96
US6911052B2Jun 28, 2005
Prosthetic foot with oblique attachment
ROLAND J CHRISTENSEN AS OPERAT25 citations92
US6805717B2Oct 19, 2004
Energy-storing prosthetic foot with elongated forefoot
ROLAND J CHRISTENSEN AS OPERAT34 citations92