OVAL CORPORATION
49Patents
27Active
49Granted
44Portfolio score
Filing activity: Jul 19, 1993 → Sep 14, 2016 · 20 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5398554A | Coriolis flowmeter with natural frequency adjusting means engaged with the counterbalancing conduit | Physics | 42 | Expired |
| US5796012A | Error correcting Coriolis flowmeter | Physics | 39 | Expired |
| US5691485A | Coaxial double tube type Coriolis flowmeter | Physics | 38 | Expired |
| US5736647A | Vortex flow meter detector and vortex flow meter | Physics | 19 | Expired |
| US6802224B2 | Arch-shaped tube type coriolis meter and method for determining shape of the coriolis meter | Physics | 18 | Expired |
| US5602346A | Mass flowmeter converter | Physics | 17 | Expired |
| US8442781B2 | Coriolis flowmeter | Physics | 13 | Active |
| US6895826B1 | Coriolis mass flowmeter | Physics | 10 | Expired |
| USD613195S1 | Converter for a flowmeter | General | 7 | Expired |
| USD613196S1 | Converter for a flowmeter | General | 7 | Expired |
| US7437949B2 | Tertiary mode vibration type Coriolis flowmeter | Physics | 7 | Expired |
| USD601050S1 | Converter for flowmeter | General | 6 | Expired |
| US6336369B1 | Straight double-tube type coriolis flow meter | Physics | 6 | Expired |
| US6807868B1 | Coriolis mass flow meter | Physics | 6 | Expired |
| US7895904B2 | Multi-vortex flowmeter employing volume flow rate as switching point | Physics | 6 | Active |
| US8069734B2 | Multi-vortex flowmeter integrating pressure gauge | Physics | 5 | Active |
| USD628106S1 | Converter for a flowmeter | General | 5 | Expired |
| US5363705A | Vortex generator having a protrusion formed at an upstream surface | Physics | 4 | Expired |
| US6588284B1 | Coriolis mass flowmeter and method of making same | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6904810B2 | Purge type vortex flowmeter | Physics | 3 | Expired |
| US7827869B2 | Multiphase flowmeter for measuring each phase flow rate of a three-phase flow consisting of gas and two kinds of liquid | Physics | 3 | Active |
| US7905141B2 | Path structure related to flow of fluid to be measured and pressure difference detection in servo type volumetric flowmeter | Physics | 3 | Active |
| US9506793B2 | Coriolis flowmeter having a cross-sectional area of channels of the manifolds enabling a reduction in pressure loss | Physics | 3 | Active |
| US8970124B2 | Field equipment photoelectric sensing sensitivity adjustment | Electricity | 3 | Active |
| US7905142B2 | Servo type volumetric flowmeter employing a pump unit system | Physics | 3 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.