Number | Name | Date | Kind |
---|---|---|---|
4096754 | Beveridge, Jr. et al. | Jun 1978 |
Number | Date | Country |
---|---|---|
0174813 | Oct 1983 | JPX |
0194317 | Oct 1985 | JPX |
Entry |
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Pedersen, et al., "A New Ultrasonic Flowmeter for the Natural Gas Industry", NBS Spec. Pub. 484, Gaithersburg, Proceedings (2/1977), pp. 293-318. |