EXHIBIT 10.28 PORTLYN CORPORATION MANUFACTURING AND SALES AGREEMENT This agreement dated June 23, 1997 is between Portlyn Corporation (the "Company"), a New Hampshire corporation with an address of RFD 1, Box 451, Route 25, Moultonboro, NH 03254 and...Manufacturing and Sales Agreement • October 7th, 1998 • Spectrascience Inc • Electromedical & electrotherapeutic apparatus • New Hampshire
