Carl A. Robbins
22Patents
12h-index
26Co-inventors
81Inventor score
Filing activity: May 29, 1979 → Nov 30, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5678643A | Acoustic logging while drilling tool to determine bed boundaries | Fixed Constructions | 149 | Expired |
| US6400646B1 | Method for compensating for remote clock offset | Electricity | 67 | Expired |
| US6374913B1 | Sensor array suitable for long term placement inside wellbore casing | Fixed Constructions | 62 | Expired |
| US5644186A | Acoustic Transducer for LWD tool | Physics | 51 | Expired |
| US6131694A | Vertical seismic profiling in a drilling tool | Physics | 51 | Expired |
| US5780784A | Cancellation of tool mode signal from combined signal | Physics | 29 | Expired |
| US4450354A | Gain stabilized natural gamma ray detection of casing thickness in a borehole | Physics | 28 | Expired |
| US5726951A | Standoff compensation for acoustic logging while drilling systems | Physics | 26 | Expired |
| US7212075B2 | Downhole clock having temperature compensation | Electricity | 20 | Expired |
| US4300043A | Stabilized radioactive logging method and apparatus | Physics | 18 | Expired |
| US6478107B1 | Axially extended downhole seismic source | Physics | 15 | Expired |
| US4481597A | Borehole spectral analog to digital converter | Electricity | 13 | Expired |
| US7339852B2 | Seismic acquisition system | Physics | 11 | Expired |
| US4459479A | Determination of casing thickness using a natural gamma ray spectroscopy technique | Physics | 10 | Expired |
| US9022145B2 | Vibration detection in a drill string based on multi-positioned sensors | Physics | 6 | Active |
| US10066474B2 | Vibration detection in a drill string based on multi-positioned sensors | Physics | 5 | Active |
| US8749400B2 | Symbol synchronization for downhole OFDM telemetry | Electricity | 4 | Active |
| US8193946B2 | Training for directional detection | Fixed Constructions | 4 | Active |
| US8634273B2 | Acoustic telemetry system using passband equalization | Fixed Constructions | 2 | Active |
| US10060248B2 | Vibration detection in a drill string based on multi-positioned sensors | Physics | 1 | Active |
| US9477008B2 | Method and system of transmitting acoustic signals from a wellbore | Fixed Constructions | 1 | Active |
| US10295692B2 | Fracture detection and localization using acoustic reflections | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.