Number | Name | Date | Kind |
---|---|---|---|
4241261 | Ebert, Jr. | Dec 1980 | |
4551812 | Gurr et al. | Nov 1985 | |
4611289 | Coppola | Sep 1986 | |
4709318 | Gephart et al. | Nov 1987 | |
4757505 | Marrington et al. | Jul 1988 | |
4789790 | Yamanaka | Dec 1988 | |
4841474 | Zandveld et al. | Jun 1989 | |
4857756 | Haneda | Aug 1989 | |
4885523 | Koenck | Dec 1989 | |
5019717 | McCurry et al. | May 1991 | |
5177371 | Faulk | Jan 1993 |
Entry |
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Teleconnect, Nov. 1991 vol. 9 No. 11 pp. 77-78 Telecon Library Inc. Author Barbara Herman title: UPS Trends. |