Solidworks lets you put all your parts together and inspect every aspect in 3 dimension. Rotate your assemblies and inspect your clearance to make sure your parts can move freely and that your design intent is respected.
At this stage, even if your assemblies are not final. We recommend sending a copy to your patent agent to start your patent pending application. Assemblies are necessary to apply for patent.
To have more information on patents visit my page : 5- PATENTS