2872. If an employment agreement entered into
after January 1, 1980, contains a provision requiring
the employee to assign or offer to assign any of his or
her rights in any invention to his or her employer, the
employer must also, at the time the agreement is made,
provide a written notification to the employee that the
agreement does not apply to an invention which
qualifies fully under the provisions of Section 2870. In
any suit or action arising thereunder, the burden of
proof shall be on the employee claiming the benefits
of its provisions.