Patents - William J. Welch
Log-periodic antenna
Gregory Engargiola and Wm. J. Welch
U.S. Patent 6,952,189. October 2005
Log-periodic antenna
Gregory Engargiola and Wm. J. Welch
U.S. Patent 6,677,913. January 2004
Log-periodic antenna
Gregory Engargiola and Wm. J. Welch
U.S. Patent 6,952,189. October 2005
Log-periodic antenna
Gregory Engargiola and Wm. J. Welch
U.S. Patent 6,677,913. January 2004