Woodcock Washburn Kurtz Mackiewicz & Norris
Network analyzer
 A network analyzer having .means for determining the type and element values of a hypothetical lossless matching circuit for a device under test (DUT) and for computing and displaying S parameters of the DUT in combination with the matching circuit. 
Hewlett Packard Company
G
G01R
inventional
Akira Hideki
Nukiyama Yamashita