> This is different, though, from the case where you are employed as a secretary for a bodyguard company and then work as a musician outside of your regular emp

> This is different, though, from the case where you are employed as a secretary for a bodyguard company and then work as a musician outside of your regular employment, isn't it? Not really. If the contract states they own everything you do while you're employed by them, they really do own everything. As for Adele, she's British. Such clauses are generally null and void in the English Common Law system. Your employer owns what they pay you do to, and what you create using employer tools. But if you work as a computer programmer, and invent a better mousetrap at home, your employer can't claim ownership of the mousetrap.