Notes about the IPN file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The IPN file type is primarily associated with 'Inventor' by Autodesk, Inc.. The Autodesk Inventor product line provides a set of design applications and 2D transition tools to help manufacturing companies move to 3D.