Develco, Inc.
19Patents
0Active
19Granted
33Portfolio score
Filing activity: Jan 21, 1974 → Apr 17, 1991
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4710708A | Method and apparatus employing received independent magnetic field components of a transmitted alternating magnetic field for determining location | Physics | 486 | Expired |
| US5160925A | Short hop communication link for downhole MWD system | Fixed Constructions | 294 | Expired |
| US3967201A | Wireless subterranean signaling method | Fixed Constructions | 104 | Expired |
| US5089779A | Method and apparatus for measuring strata resistivity adjacent a borehole | Physics | 80 | Expired |
| US4617960A | Verification of a surface controlled subsurface actuating device | Emerging Cross-Sectional Technologies | 68 | Expired |
| US4787093A | Combinatorial coded telemetry | Electricity | 54 | Expired |
| US4908804A | Combinatorial coded telemetry in MWD | Electricity | 40 | Expired |
| US3956690A | Trimmed superconductive magnetic pickup coil circuits | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4736791A | Subsurface device actuator requiring minimum power | Fixed Constructions | 22 | Expired |
| US4823125A | Method and apparatus for stabilizing a communication sensor in a borehole | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4646831A | Precision connector for well instrumentation | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4587741A | Ball inclinometer | Physics | 16 | Expired |
| US5067114A | Correlation for combinational coded telemetry | Fixed Constructions | 13 | Expired |
| US4953616A | Solenoid actuator and pulse drive | Fixed Constructions | 10 | Expired |
| US3965411A | Gradient wound trim coil for trimming a primary pickup coil | Physics | 6 | Expired |
| US4878053A | Actuation method | Fixed Constructions | 4 | Expired |
| US4926188A | Gimballed antenna | Electricity | 2 | Expired |
| US4221834A | Superconductive magnetic shield and method of making same | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5027129A | Gimballed antenna | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.