71471138
Jun 10, 1944
Feb 8, 1949
ELECTRIC HIGH FREQUENCY TESTING AND MEASURING APPARATUS FOR TESTING AND MEASURING HIGH FREQUENCY ELECTRICAL EQUIPMENT AND PHENOMENA-NAMELY, CHARACTERISTIC MONITORING, MEASURING AND INDICATING APPARATUS; WATTMETERS, MATCHING TRANSFORMERS, IMPEDANCE METERS, WAVE METERS, FREQUENCY STANDARDS, AND STANDARD CAVITIES
Fancy Goods