| Patents for G01F 25 - Testing or calibrating of apparatus for measuring volume, volume flow, or liquid level, or for metering by volume (5,338) |
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| 09/23/1980 | US4224606 Fluid level detector test switch |
| 05/20/1980 | US4203316 Device and method for calibrating pulmonary function testing equipment |
| 01/09/1980 | EP0006778A1 Apparatus for limiting the filling of a tank |
| 12/18/1979 | US4179740 Vehicle performance analyzer |
| 11/27/1979 | US4175421 Meter provers |
| 10/23/1979 | US4171638 System for measuring pulsating fluid flow |
| 05/08/1979 | US4152922 Apparatus and method for determining the characteristic of a flowmeter |
| 04/24/1979 | CA1053022A1 Liquid meter prover apparatus |
| 02/06/1979 | CA1048112A1 Precision test frequency generator |
| 01/16/1979 | US4134288 Liquid meter prover apparatus |
| 12/12/1978 | CA1044042A1 Method and apparatus for reproducing operating conditions in induced flow devices |
| 12/05/1978 | US4128002 Meter proving apparatus |
| 10/31/1978 | CA1041400A1 Flow control apparatus and system |
| 08/15/1978 | US4106328 Portable prover barrel |
| 05/30/1978 | US4091653 Turbine meter in-line checking apparatus and method |
| 03/21/1978 | US4079619 Apparatus and method for standardizing a pipeline pig detector |
| 02/14/1978 | US4073304 System for calibrating a pump |
| 10/04/1977 | US4051711 Calibration apparatus for gas flowmeters |
| 06/07/1977 | US4027523 Methods and apparatus for proof testing gas meters |
| 04/26/1977 | US4019363 Calibration apparatus and method |
| 03/22/1977 | US4012939 Location detecting devices and methods |
| 12/21/1976 | US3998089 Liquid meter prover apparatus |
| 11/30/1976 | US3994153 Variable flow resistance calibrator |
| 11/16/1976 | US3992680 Precision test frequency generator |
| 09/07/1976 | US3978708 Members moving within tubes |
| 09/07/1976 | US3978707 Flow control apparatus and system |
| 08/24/1976 | US3975953 Method and apparatus for reproducing operating conditions in induced flow devices |
| 05/25/1976 | US3958444 Semi-automatic valve control for a prover loop |
| 05/25/1976 | US3958443 Apparatus for proving and calibrating cryogenic flow meters |
| 05/11/1976 | US3955796 Flow control apparatus |
| 05/11/1976 | US3955399 Uni-directional meter prover apparatus |
| 03/16/1976 | US3943749 Unidirectional meter prover sphere interchange and method |
| 03/02/1976 | US3940971 System for testing flow meters |
| 02/24/1976 | US3939688 Volumetric calibration |
| 02/10/1976 | US3937048 Methods and apparatus for proving gas meters |
| 02/03/1976 | US3935732 Process and apparatus for the measurement of volume, flow rate and consumption, at a predeterminable pressure, of combustible liquid by an apparatus in place and functioning |
| 01/20/1976 | US3933038 Volumetric determination of contaminated liquid or gaseous media |
| 01/20/1976 | US3933027 Apparatus and method for proving meters |