Started doing some research. If you want to see a scary search go to the USPTO and look at all the words Motorola has trade marked over the years. It's almost the size of the new speak dictionary.
The the term "Private-Line" was issued in 1976, but is no longer an active trade mark. Looks like it was canceled after 6 years and not renewed. "Vibrasponder" and "Vibrasender" were issued in 1955 but are also considered dead, not sure when they were canceled. Found these patents issued to Motorola that may be intresting: http://www.google.com/patents/download/SELECTIVE_CALLING_SYSTEM.pdf?id=hoFRAAAAEBAJ&output=pdf&sig=ACfU3U0ID3xNtKITrFOSjudbtZqbACKYVA&source=gbs_overview_r&cad=0 http://www.google.com/patents/download/VIBRATING_REED_CONTROLLED.pdf?id=ioFRAAAAEBAJ&output=pdf&sig=ACfU3U2aiaRzmTCYYspbRZr9YGM8rKCNqQ&source=gbs_overview_r&cad=0 http://www.google.com/patents/download/SELECTIVE_SIGNALING_SYSTEM.pdf?id=VB5oAAAAEBAJ&output=pdf&sig=ACfU3U191hc0-cyfTEjoNQ-q4STmizi1pA&source=gbs_overview_r&cad=0 http://www.google.com/patents/download/SQUELCH_SYSTEM.pdf?id=5F5xAAAAEBAJ&output=pdf&sig=ACfU3U0fn8ZYd0DxgmR-gwXzNImgpoZ82g&source=gbs_overview_r&cad=0 Still couldn't find a list of PL tones in any of them so then I did a search on EIA PL Tones and found this page: http://www.geocities.com/euro446/ctcss.html It lists the EIA Group A tone set as: 67.0 77.0 88.5 100.0 107.2 114.8 123.0 131.8 141.3 151.4 162.2 173.8 186.2 203.5 218.1 233.6 250.3 Maybe this is the set you are looking for?
