Number | Name | Date | Kind |
---|---|---|---|
4156809 | Phillips | May 1979 | |
4346478 | Sichling | Aug 1982 | |
4417140 | Adolfsson et al. | Nov 1983 |
Entry |
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McGowan, "Multiple Pressure Transmitters Speak Digital on Two Wires", Control Engineering, Dec., 1979. |
"Smoke Alarm uses Fiber Optics for Hazardous Areas" Electronic Design, Sep., 1981, p. 64. |