An opposition to the grant of a patent may be lodged within two months as from the date of publication of the application. There are no provisions in the law as to appealing the decisions of the Registrar. The provisions of the Patent Law in Tunisia stipulate that a patent application should be filed before the invention has been published, or used, or has otherwise received sufficient publicity to allow it to be put into practice either in Tunisia or abroad. A patent is valid for twenty years as from the date of filing the patent application. Annuities are payable as from the date of filing.
Annuities are payable in the anniversary date of filing.
The right to a patent may be assigned or transferred through succession. The assignment of patent applications and granted patents must be made in writing. An assignment shall have no effect against third parties unless it has been entered in the relevant records of the Patent Office. Working of patents in Tunisia is an official requirement. Working must be effected within four years as from the date of filing or three years as from the date of the grant of the patent.