The Polish patent will protect your invention in Poland. If you want to protect your invention also abroad, the patent attorney must submit the appropriate filing there. Once you have made your first application in Poland (or another country), there are 12 months to decide in which countries you want to protect the invention further. This allows you to estimate the market’s chances ahead of the situation when costs will be involved.
If you do not decide where to submit further applications within this year, the patent attorney can file an international patent application under the PCT (Patent Cooperation Treaty) mode, which will extend the original period of one year to 18 months. In this case, you have 30 months to decide where to apply for patent protection.