An article in Haaretz today reports on a recent Supreme Court decision suggesting that the inventor listed on a patent application may be entitled to compensation for a service invention even where he signed an agreement assigning the invention to his employer and waiving his rights to compensation. A service invention, described in Section 132 of the Patent Law, is an invention created during the employees' term of service for the employer and as part of his work which, unless agreed otherwise, belongs to the employer. It is similar to a work for hire in the US copyright context.
I think the article makes two errors (but correct me if I'm wrong).