Inquiry (采购产品): Tank and in line sight glasses I am the inventor of a pattented sight glass that is clear when it is empty but changes color when it is full. This prevents the misreading of an empty or overfilled system. It works on all clear fluids including refrigerant and mineral oil. I would like to license my invention to your company. Please contact me at the above Email address or telephone me at 612-860-6441. **** Hidden Message ***** Bob Dillon 55429 Company: Dillon Enterprises E-mail: www.dillonenterprises@comcast.net **** Hidden Message ***** www.dillonenterprises@comcast.net
