Number | Name | Date | Kind |
---|---|---|---|
4297534 | Epstein et al. | Oct 1981 | |
4578540 | Borg et al. | Mar 1986 | |
4585904 | Mincone et al. | Apr 1986 | |
4661975 | Brecher | Apr 1987 | |
4679001 | West | Jul 1987 | |
4751728 | Treat | Jun 1988 | |
4893335 | Fuller et al. | Jan 1990 | |
4924512 | Sizemore et al. | May 1990 | |
4964159 | Son | Oct 1990 | |
4965459 | Murray | Oct 1990 | |
5200995 | Gaukel et al. | Apr 1993 |
Entry |
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"The California Phone Rush Is On," by Calvin Sims, The New York Times, Aug. 11, 1993. |