by or related to Pretzel Time. The Franchisee (or any of its Owners) may not thereafter use any name, logo type, or symbol confusingly similar to Pretzel Time's Service Mark, logo type or symbol. If Franchisee continues operating a business at the franchised location it will exert every reasonable effort to inform the public of his new status, including a change of telephone number and advertising materials. The Franchise granted to Franchisee hereunder to sell Products bearing Pretzel Time's Marks does not include the right to sell or advertise for sale of Franchisee's Franchise itself or of its business location. No advertisement by Franchisee or other public solicitation for sale of his interest in this Agreement may include a representation of Pretzel Time's trademark or any reference to Pretzel Time or its trademark system. 20.C. RETURN OF MATERIALS. Franchisee agrees to return to Pretzel Time all signs, sign-faces, forms, invoices, letterhead, and other materials containing any Mark or otherwise identifying or relating to a Pretzel Time Unit and allow Pretzel Time, without liability to remove all such items from the Unit. Franchisee also agrees to return all materials and confidential information loaned to Franchisee, including, without limitation, all Operations Manuals and Training Manuals and videos. Franchisee agrees to return all materials and supplies identified by the Marks in full cases or packages to Pretzel Time for credit and dispose of all other materials and supplies, but not equipment, identified by the Marks within thirty (30) days after the effective date of termination or expiration of this Agreement. 20.D. TELEPHONE COMPANY. Franchisee agrees to notify the telephone company and all telephone directory publishers of the termination or expiration of Franchisee's right to use any telephone and telecopy numbers and any regular, classified or other telephone directory listings associated with any Mark