Any notices required or permitted to be given hereunder shall be given in writing and delivered in person or sent certified mail, postage prepaid, return receipt requested, to the respective parties at their addresses set forth at the beginning of this Agreement or at such other addresses as may hereinafter be designated by such party in writing to other parties.  If a notice is given to the Seller with a copy to­­­­­­­­­ 25 Commerce Way, North Andover, MA 01845.