Robert Freedman
45Patents
19h-index
34Co-inventors
81Inventor score
Filing activity: Aug 31, 1976 → Oct 18, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5486762A | Apparatus including multi-wait time pulsed NMR logging method for determining accurate T2-distributions and accurate T1/T2 ratios and generating a more accurate output record using the updated T2-distributions and T1/T2 ratios | Physics | 129 | Expired |
| US5291137A | Processing method and apparatus for processing spin echo in-phase and quadrature amplitudes from a pulsed nuclear magnetism tool and producing new output data to be recorded on an output record | Physics | 95 | Expired |
| US5381092A | Method and apparatus for compressing data produced from a well tool in a wellbore prior to transmitting the compressed data uphole to a surface apparatus | Physics | 88 | Expired |
| US4319220A | Alarm system for monitoring pressurized vehicular tires | Electricity | 83 | Expired |
| US6229308A | Formation evaluation using magnetic resonance logging measurements | Emerging Cross-Sectional Technologies | 78 | Expired |
| US5210691A | Method and apparatus for producing a more accurate resistivity log from data recorded by an induction sonde in a borehole | Physics | 53 | Expired |
| US6032101A | Methods for evaluating formations using NMR and other logs | Emerging Cross-Sectional Technologies | 44 | Expired |
| US5451873A | Method and apparatus for determining the in situ larmor frequency of a wellbore NMR tool to compensate for accumulation of magnetic material on the magnet housing of the tool | Physics | 43 | Expired |
| US4220907A | Electromagnetic power generator | Electricity | 38 | Expired |
| US7053611B2 | Method and apparatus for using pulsed field gradient NMR measurements to determine fluid properties in a fluid sampling well logging tool | Physics | 36 | Expired |
| US4916616A | Self-consistent log interpretation method | Physics | 33 | Expired |
| US6765380B2 | Determining wettability of an oil reservoir using borehole NMR measurements | Physics | 33 | Expired |
| US8471559B2 | Downhole micro magnetic resonance analyzer | Physics | 33 | Active |
| US4278941A | High frequency induction log for determining resistivity and dielectric constant of the earth | Physics | 31 | Expired |
| US7091719B2 | Method for determining properties of formation fluids | Physics | 29 | Expired |
| US6859032B2 | Method for determining molecular properties of hydrocarbon mixtures from NMR data | Physics | 27 | Expired |
| US6952096B2 | Method and apparatus for determining speed and properties of flowing fluids using NMR measurements | Fixed Constructions | 24 | Expired |
| US7309983B2 | Method for determining characteristics of earth formations | Physics | 24 | Expired |
| US7683613B2 | High pressure/high temperature magnetic resonance tool | Physics | 21 | Active |
| US5168234A | Method and apparatus for measuring azimuthal as well as longitudinal waves in a formation traversed by a borehole | Physics | 17 | Expired |
| US6459992B1 | Method and apparatus for determining logging tool displacements | Fixed Constructions | 16 | Expired |
| US6147489A | Method and apparatus for measuring total nuclear magnetic resonance porosity | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6242893A | Lithium-ion and lithium polymer battery recharging | Electricity | 14 | Expired |
| US6841996B2 | Nuclear magnetic resonance apparatus and methods for analyzing fluids extracted from earth formation | Physics | 14 | Expired |
| US6703832B2 | Method for detecting hydrocarbons by comparing NMR response at different depths of investigation | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.