Number | Date | Country | Kind |
---|---|---|---|
3422004 | Jun 1984 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3486024 | Astheimer | Dec 1969 | |
3551681 | Astheimer | Dec 1970 | |
3714432 | Jalink, Jr. | Jan 1973 | |
3920994 | Cargille | Nov 1975 |
Number | Date | Country |
---|---|---|
P3214375.3 | Oct 1983 | DEX |
P3322750.0 | Jan 1985 | DEX |
Entry |
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Van Dijk, P., "The Horizon Sensor", Philips Tech. Rev. 34, No. 8, p. 213. |