Panex Corporation
26Patents
0Active
26Granted
33Portfolio score
Filing activity: Sep 27, 1976 → Oct 12, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5455573A | Inductive coupler for well tools | Electricity | 79 | Expired |
| US5457988A | Side pocket mandrel pressure measuring system | Fixed Constructions | 49 | Expired |
| US4628995A | Gauge carrier | Fixed Constructions | 46 | Expired |
| US5320169A | Gauge carrier | Mechanical Engineering; Lighting; Heating | 38 | Expired |
| US5168419A | Capacitor and pressure transducer | Physics | 38 | Expired |
| US4875369A | Pressure sensor system | Fixed Constructions | 35 | Expired |
| US4924701A | Pressure measurement system | Physics | 28 | Expired |
| US4875368A | Pressure sensor system | Fixed Constructions | 26 | Expired |
| US4873870A | Micro displacement force transducer | Physics | 14 | Expired |
| US4091683A | Single channel electrical comparative measuring system | Physics | 14 | Expired |
| US6459383B1 | Downhole inductively coupled digital electronic system | Fixed Constructions | 11 | Expired |
| US5974894A | Fused silica high pressure sensor | Physics | 10 | Expired |
| US5207767A | Capacitor and pressure transducer | Physics | 9 | Expired |
| US5463903A | Torque flowmeter | Physics | 8 | Expired |
| US4763259A | Memory processing systems for well tools | Physics | 8 | Expired |
| US5554804A | High temperature pressure monitoring system | Fixed Constructions | 8 | Expired |
| US5388462A | Capacitance pressure transducer | Physics | 7 | Expired |
| US5749417A | Production log | Physics | 7 | Expired |
| US5363703A | Dual transducer | Physics | 7 | Expired |
| US4624136A | Down hole power conversion means for fully utilizing batteries | Fixed Constructions | 7 | Expired |
| US5448477A | Systems for input and output of data to a well tool | Fixed Constructions | 6 | Expired |
| US5515039A | Surface/downhole pressure recording system | Fixed Constructions | 5 | Expired |
| US4740897A | Memory operated well tools | Fixed Constructions | 5 | Expired |
| US5142913A | Non-quartz resonating transducer | Physics | 5 | Expired |
| US4870536A | Micro displacement force transducer | Physics | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.