definiens: shall mean all information, including without limitation, proprietary information and materials ( whether or not patentable ) regarding a party 's technology, products, business information or objectives, which is designated as confidential in writing by the disclosing party, whether by letter or by the use of an appropriate stamp or legend, prior to or at the time any such information is disclosed by the disclosing party to the other party . Notwithstanding the foregoing, ( a ) all [COMPANY] Patent Rights and Technology shall constitute Proprietary Information, ( b ) aU tracings and other irtforrnation identifying persons or institutions to whom [COMPANY] sells Products or Systems shall constitute Proprietary Information ; and ( c ) information which is orally, electronically or visuaUy disclosed by a party, or is disclosed in writing without an appropriate letter, stamp or legend, shall constitute Proprietary Information of a party ( i ) if the disclosing party, within thirty ( 30 ) days after such disclosure, delivers to the other party a written document or documents describing the information and referencing the place and date of such oral, visual, electronic or written disclosure and the names of the persons to whom such disclosure was m3.de . or ( li ) such information i~ of the type that is customarily 5 considered to be confidential information by persons engaged in activities that are substantially similar to the activities being engaged in by the parties pursuant to this Agreement