That's not correct. "Arbeitnehmererfindungen" only apply to inventions you make as part of your paid work. See https://de.wikipedia.org/wiki/Arbeitnehmererfindu

That's not correct. "Arbeitnehmererfindungen" only apply to inventions you make as part of your paid work. See https://de.wikipedia.org/wiki/Arbeitnehmererfindung https://de.wikipedia.org/wiki/Arbeitnehmererfindung Whatever you do in your spare time is up to you and your employer has no saying over it, unless he can prove that it negatively impacts your job performance.