n.hereafter; henceforth; after this/that; ever since
involving future development
After this, she never came back.
He went to Shanghai last year and has lived there ever since.
She went to the city in 1958 and has worked there ever since.
I've not seen him again since bidding farewell to him with a handshake at the station five years ago.
The final section provides that any work produced for the company is thereafter owned by the company.