73168512
May 1, 1978
May 26, 1981
Apparatus-Namely Time Release Remote Loop Disconnect for Use in Remotely Disconnecting Communication and Electronic Instruments; Latching Remote Loop Disconnect with Automatic Reset for Use in Remotely Disconnecting Communication and Electronic Instruments; Unit for Providing Continuous Balanced or Momentary Ground Resistance and/or Isolating Ringers from Ground During Active Mode of Communication
Electrical and Scientific Apparatus