John E. Mercer
274Patents
37h-index
36Co-inventors
90Inventor score
Filing activity: Nov 1, 1976 → Mar 29, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5337002A | Locator device for continuously locating a dipole magnetic field transmitter and its method of operation | Physics | 238 | Expired |
| US6035951A | System for tracking and/or guiding an underground boring tool | Electricity | 165 | Expired |
| US4674579A | Method and apparatus for installment of underground utilities | Fixed Constructions | 157 | Expired |
| US5633589A | Device and method for locating an inground object and a housing forming part of said device | Physics | 147 | Expired |
| US6496008B1 | Flux plane locating in an underground drilling system | Physics | 144 | Expired |
| US6223826A | Auto-extending/retracting electrically isolated conductors in a segmented drill string | Fixed Constructions | 139 | Expired |
| US5155442A | Position and orientation locator/monitor | Physics | 123 | Expired |
| US6344904B1 | Arrangement for reading from and/or writing to flexible sheet media in a curved configuration and method | Electricity | 116 | Expired |
| US4806869A | An above-ground arrangement for and method of locating a discrete in ground boring device | Physics | 115 | Expired |
| US4881083A | Homing technique for an in-ground boring device | Fixed Constructions | 112 | Expired |
| US6697174B2 | Arrangement for reading from and/or writing to flexible sheet media in a curved configuration and method | Electricity | 103 | Expired |
| US5698981A | Technique for establishing at least a portion of an underground path of a boring tool | Physics | 103 | Expired |
| US4714118A | Technique for steering and monitoring the orientation of a powered underground boring device | Fixed Constructions | 95 | Expired |
| US6285190A | Skin depth compensation in underground boring applications | Physics | 92 | Expired |
| US6279668A | Boring tool control using remote locator including a command generation arrangement and method | Fixed Constructions | 85 | Expired |
| US5764062A | Technique for establishing and recording a boring tool path using a survey reference level | Physics | 78 | Expired |
| US6417666B1 | Boring tool tracking system and method using magnetic locating signal and wire-in-pipe data | Physics | 77 | Expired |
| US5767678A | Position and orientation locator/monitor | Physics | 76 | Expired |
| US6727704B2 | Boring tool tracking/guiding system and method with unconstrained target location geometry | Physics | 76 | Expired |
| US4435902A | Articulated boom water jet cutting apparatus | Emerging Cross-Sectional Technologies | 75 | Expired |
| US6079506A | Boring tool control using remote locator | Fixed Constructions | 75 | Expired |
| US6655464B2 | Auto-extending/retracting electrically isolated conductors in a segmented drill string | Fixed Constructions | 73 | Expired |
| US6737867B2 | Locating arrangement and method using boring tool and cable locating signals | Physics | 61 | Expired |
| US6250402A | Establishing positions of locating field detectors and path mappings in underground boring tool applications | Physics | 59 | Expired |
| US6756783B2 | Multi-frequency boring tool locating system and method | Physics | 58 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.