73111465
Jan 4, 1977
May 5, 1981
Data Communications Systems for Remote Control and Surveillance of Other Operating Systems, Such as Mining, Marine Petrochemical, Distributive Factory, or the Like Operations; Said Systems Comprising a Central Computer and at Least One Remote Data Output or Input Terminal; Said Systems Being Capable of Being Adapted to Simulate Control and Surveillance for Teaching Purposes
Electrical and Scientific Apparatus