| Number | Name | Date | Kind |
|---|---|---|---|
| 4071698 | Barger, Jr. et al. | Jan 1978 | |
| 4320256 | Freeman | Mar 1982 | |
| 4393277 | Besen et al. | Jul 1983 | |
| 4710955 | Kauffman | Dec 1987 | |
| 4785408 | Britton et al. | Nov 1988 | |
| 4789863 | Bush | Dec 1988 | |
| 4876592 | Von Kohorn | Oct 1989 | |
| 4905094 | Pocock et al. | Feb 1990 | |
| 4926255 | Von Kohorn | May 1990 | |
| 4947028 | Gorog | Aug 1990 | |
| 5001745 | Pollock | Mar 1991 | |
| 5151782 | Ferraro | Sep 1992 | |
| 5182705 | Barr et al. | Jan 1993 | |
| 5233654 | Harvey et al. | Aug 1993 | |
| 5237628 | Levitan | Aug 1993 | |
| 5337347 | Halstead-Nussloch et al. | Aug 1994 | |
| 5539635 | Larson, Jr. | Jul 1996 |
| Entry |
|---|
| "Music Marketers Target Specific Consumers With Ever More-Refined Telephone Sampling Strategies", Entertainment Marketing Letter, vol. 6, No. 3, Mar., 1993, pp. 1, 2 and 8. |
| Young, Jeffrey "Your Playing My Song," Forbes, Jul. 5, 1993, pp. 114-115. |