OHIO WILLOW WOOD LimbLogic VS Series Prosthetist's Manual page 26

Technical Information
Ohio Willow Wood Retention of Rights
Ohio Willow Wood retains all intellectual property rights reflected
or incorporated in its physical products, regardless of the transfer of
the physical products to another party or parties.
There are no field-serviceable parts inside the Vacuum Pump. Opening
the Vacuum Pump will void the warranty.
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