Radiodetection Limited
73Patents
19Active
73Granted
43Portfolio score
Filing activity: Oct 24, 1988 → Nov 15, 2017 · 14 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5920194A | Device for locating objects that emit electromagnetic signals | Physics | 135 | Expired |
| US5917325A | Method for locating an inaccessible object having a magnetic field generating solenoid | Physics | 129 | Expired |
| US5576973A | Apparatus and method for obtaining geographical positional data for an object located underground | Physics | 124 | Expired |
| US6127827A | Method of identifying a buried cable by applying a low frequency signal to the cable and detecting the resultant field | Physics | 100 | Expired |
| US5014008A | System for detecting the location and orientation of a temporarily inaccessible object | Physics | 80 | Expired |
| US5260659A | Method and apparatus for tracing conductors using an alternating signal having two components related in frequency and phase | Physics | 72 | Expired |
| US5828219A | Method of detecting faults in the insulation layer of an insulated concealed conductor | Physics | 69 | Expired |
| US6617856B1 | Electronic marker locator system and method | Physics | 65 | Expired |
| US6549011B2 | Conductor tracing system | Physics | 62 | Expired |
| US6633163B2 | Apparatus and method for detecting an underground cable while operating a piece of machinery | Physics | 58 | Expired |
| US6107801A | Locating an inaccessible object by detecting horizontal and vertical components of a magnetic field | Physics | 58 | Expired |
| US7977950B2 | Time-domain reflectometer | Physics | 57 | Active |
| US6968296B2 | Cable detector with decimating filter and filtering method | Electricity | 50 | Expired |
| US6728662B2 | Method and system for remotely servicing a detection device | Electricity | 48 | Expired |
| US5764127A | Inductive transmitters for conductor location | Physics | 48 | Expired |
| US6777923B2 | System and method for detecting a concealed current carrying conductor | Physics | 48 | Expired |
| US6297736A | Locating concealed conductors | Physics | 47 | Expired |
| US6459266B1 | Sonde locator | Physics | 47 | Expired |
| US6836231B2 | Signal generator | Physics | 47 | Expired |
| US7079591B2 | Method and system for recovering information from a magnetic field signal usable for locating an underground object | Electricity | 47 | Expired |
| US7339379B2 | Method of and apparatus for determining if a buried current carrying conductor is buried above predetermined minimum depth | Physics | 47 | Active |
| US6825775B2 | Method and system for reducing interference | Electricity | 47 | Expired |
| US4991301A | Inductive displacement sensors | Physics | 46 | Expired |
| US7310584B2 | Enhanced sonde recognition | Physics | 45 | Expired |
| US7342537B2 | Method of and apparatus for detecting a current carrying conductor | Physics | 44 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.