Does copyright law give the employer full protection?

In practice, we often see copyright clauses where the employee or contractor is to transfer the copyright of ideas and concepts to the company. Such clauses create a false belief that on the part of the employer everything is secure, their interest Is fully protected, and the topic is covered. Why such belief may be wrong? – Jakub Grabowski comments for IT-Leaders.

The article in Polish is avialible: here.