Inventor
SANDAHL DAVID
IS39 patents
⚠️ This page may combine multiple inventors who share the name “SANDAHL DAVID”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OSSUR HF
20 patentsUS9072617B2Jul 7, 2015
Prosthetic device, system and method for increasing vacuum attachment
OSSUR HF34 citations97
US9044348B2Jun 2, 2015
Prosthetic device, system and method for increasing vacuum attachment
OSSUR HF33 citations97
US9757256B2Sep 12, 2017
Pump mechanism for vacuum suspension system
OSSUR HF26 citations94
US9615946B2Apr 11, 2017
Prosthetic device, system and method for increasing vacuum attachment
OSSUR HF21 citations94
US9889025B2Feb 13, 2018
Vacuum assisted suspension system
OSSUR HF13 citations92
US9707106B2Jul 18, 2017
Adjustable seal system, seal component and method for using the same
OSSUR HF16 citations92
US9603726B2Mar 28, 2017
Adjustable seal system, seal component and method for using the same
OSSUR HF16 citations92
US9486335B2Nov 8, 2016
Prosthetic device, system and method for increasing vacuum attachment
OSSUR HF22 citations92
US9820873B2Nov 21, 2017
Vacuum suspension system
OSSUR HF15 citations84
US9364348B2Jun 14, 2016
Vacuum suspension system
OSSUR HF14 citations84
US9877851B2Jan 30, 2018
Adjustable seal system, seal component and method for using the same
OSSUR HF7 citations83
US11141294B2Oct 12, 2021
Prosthetic device, system and method for increasing vacuum attachment
OSSUR HF1 citations73
US10405999B2Sep 10, 2019
Prosthetic joint with cam locking mechanism
OSSUR HF2 citations73
USRE50679EDec 2, 2025
Prosthetic device, system and method for increasing vacuum attachment
OSSUR HF0 citations62
US11696842B2Jul 11, 2023
Vacuum assisted suspension system
OSSUR HF0 citations62
US11058561B2Jul 13, 2021
Prosthetic device, system and method for increasing vacuum attachment
OSSUR HF0 citations62
US10729568B2Aug 4, 2020
Pump mechanism for vacuum suspension system
OSSUR HF0 citations52
US10617537B2Apr 14, 2020
Vacuum assisted suspension system
OSSUR HF0 citations52
US10369018B2Aug 6, 2019
Prosthetic device, system and method for increasing vacuum attachment
OSSUR HF0 citations52
US9474636B2Oct 25, 2016
Valve for prosthetic device
OSSUR HF1 citations51
OSSUR ICELAND EHF
11 patentsUS11357647B2Jun 14, 2022
Pump system
OSSUR ICELAND EHF5 citations83
US10413429B2Sep 17, 2019
Pump system
OSSUR ICELAND EHF7 citations83
US11376139B2Jul 5, 2022
Pump system
OSSUR ICELAND EHF1 citations72
US10512554B2Dec 24, 2019
Pump system
OSSUR ICELAND EHF4 citations72
US12097605B2Sep 24, 2024
Adapter for a rotary device
OSSUR ICELAND EHF0 citations62
US12004972B2Jun 11, 2024
Pump system
OSSUR ICELAND EHF0 citations62
US11413167B2Aug 16, 2022
Prosthetic joint with cam locking mechanism
OSSUR ICELAND EHF0 citations62
US11311997B2Apr 26, 2022
Adapter for a rotary device
OSSUR ICELAND EHF1 citations62
US12220329B2Feb 11, 2025
Pump system
OSSUR ICELAND EHF0 citations61
US12156845B2Dec 3, 2024
Locking and adjustment mechanism for exoskeleton
OSSUR ICELAND EHF0 citations56
US12514730B2Jan 6, 2026
Ankle-foot orthosis and method for making the same
OSSUR ICELAND EHF0 citations42
OESSUR ICELAND EHF
6 patentsUS10821007B2Nov 3, 2020
Prosthetic feet having heel height adjustability
OESSUR ICELAND EHF8 citations82
US10624765B2Apr 21, 2020
Variable stiffness prosthetic foot
OESSUR ICELAND EHF2 citations73
US11771572B2Oct 3, 2023
Prosthetic feet having heel height adjustability
OESSUR ICELAND EHF2 citations71
US11446166B2Sep 20, 2022
Prosthetic foot with removable flexible members
OESSUR ICELAND EHF3 citations71
US12502288B2Dec 23, 2025
Prosthetic foot with removable flexible members
OESSUR ICELAND EHF0 citations61
US12414867B1Sep 16, 2025
Prosthetic feet with increased flexibility to accommodate different heel heights
OESSUR ICELAND EHF0 citations50