75327044
Jul 18, 1997
Feb 1, 2000
wave guides, namely, signal processors for transmitting analog and digital data from airport control towers to airplanes; wave guide systems, namely, signal processors for automatically indicating speed, position, or location of automobiles, trains, boats, and trucks; wave guide transmission and automation systems, namely, signal processors for use in transport; and parts for the aforesaid
Electrical and Scientific Apparatus