CAD designs prepared using the Autodesk Inventor (.ipt) can be exported to all kinds of exchange formats, including the common 3D object format (.obj). This should be doable in Inventor (via plug-in) and perhaps also other 3D modeling / CAD software or even some dedicated converters.
Convert AutoDesk Inventor CAD part to 3D object graphics.
We found 5 software records in the database related to .ipt to .obj file format conversion.
Microsoft Windows software - convert ipt to obj on Windows
A 3D CAD translation softwate
Convert from ipt file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned ipt to obj. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A widely-used 3D animation application from Autodesk
A dedicated CAD converter
On-line services software - convert ipt to obj on web
A commercial online CAD converter
An online CAD conversion service