A recent Slow German Podcast had the following sentence:
Natürlich blieb Einstein kein Angestellter am Patentamt.
It seems to me that it might be better to say it this way:
Natürlich blieb Einstein einen Angestellter des Patentamt nicht.
The first sentence says that Einstein was staying as not an employee -- he was not an employee and he was staying that way. The second sentence says that Einstein was not staying as an employee, which is the correct meaning -- he was an employee but he would not stay one. Opinions, please?