The man behind Learjet was also the inventor of this early tape format that carried 4 pairs of stereo tracks
... by Bernard Cousino of Toledo, Ohio, around a single reel carrying a 
continuous ... the Lear Jet, modified the 4-track technology to create the Stereo 8 
cartridge,... [DOC] [TLE] Stereo - Vinyl Record News [PAR] History of Stereo Formats.