Exhibit 4.8 REGISTRATION RIGHTS AGREEMENT This Registration Rights Agreement is made and entered into as of December 20, 2004 (this "Agreement"), by and between Xybernaut Corporation, a Delaware corporation (the "Company"), and Polar Properties Ltd.,...Registration Rights Agreement • December 30th, 2004 • Xybernaut Corp • Computer communications equipment • New York
Exhibit 4.3 COMMON STOCK AND WARRANT PURCHASE AGREEMENT THIS COMMON STOCK AND WARRANT PURCHASE AGREEMENT is dated as of December 20, 2004 (this "Purchase Agreement"), by and between XYBERNAUT CORPORATION, a Delaware corporation, having its principal...Common Stock and Warrant Purchase Agreement • December 30th, 2004 • Xybernaut Corp • Computer communications equipment • New York
