A Dutch patent is valid only in the Netherlands, but you can also register your patent in most other countries. After your first application in the Netherlands, you have 12 months to submit the same application in other countries. You also have the option to apply for a patent in one single process for all the countries that are members of the EPC (European Patent Convention). Or you can start an international application with WIPO (World Intellectual Property Organisation).
Do you want others to use your patent, trademark or design at a cost? You can arrange this and construct a licence contract. A license gives someone permission to manufacture your product.