Number | Date | Country | Kind |
---|---|---|---|
2-14246 | Jan 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4734858 | Schlafly | Mar 1988 | |
4817136 | Rhoads | Mar 1989 | |
4850009 | Zook et al. | Jul 1989 | |
4868849 | Tamaoki | Sep 1989 | |
4916441 | Gombrich | Apr 1990 | |
4969180 | Watterson et al. | Nov 1990 | |
5099507 | Mulcai et al. | Mar 1992 | |
5117455 | Danish | May 1992 | |
5119414 | Izumi | Jun 1992 |
Number | Date | Country |
---|---|---|
0094867 | Nov 1983 | EPX |
0317496 | May 1989 | EPX |
0388075 | Oct 1989 | EPX |
Entry |
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Free, "Personal Pocket Phones", Popular Science Aug. 1990. |