Number | Name | Date | Kind |
---|---|---|---|
3134551 | Eldridge et al. | May 1964 | |
3341143 | Nieland et al. | Sep 1967 | |
3718297 | Eagle | Feb 1973 | |
4015790 | Gelardi et al. | Apr 1977 | |
4022397 | Lowry | May 1977 |
Entry |
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RCA Technical Communication, "The Eight Track Cartridge; Putting It All Together", J. C. Ruda, pp. 30-33. |