John W. Berthold
50Patents
16h-index
28Co-inventors
84Inventor score
Filing activity: Apr 18, 1979 → Feb 16, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5845033A | Fiber optic sensing system for monitoring restrictions in hydrocarbon production systems | Physics | 120 | Expired |
| US5225883A | Video temperature monitor | Physics | 64 | Expired |
| US6289143A | Fiber optic acoustic emission sensor | Physics | 40 | Expired |
| US4262992A | Variable integrated optical logic element | Physics | 39 | Expired |
| US5258614A | Optical fiber loop temperature sensor | Physics | 30 | Expired |
| US5086220A | Radiation imaging fiber optic temperature distribution monitor | Physics | 30 | Expired |
| US5220172A | Fluorescence analyzer for lignin | Physics | 27 | Expired |
| US5216483A | Fluorescence analyzer for lignin | Physics | 22 | Expired |
| US5386729A | Temperature compensated microbend fiber optic differential pressure transducer | Physics | 21 | Expired |
| US5035511A | Distributed fiber optic temperature sensor based on time domain transmission | Physics | 20 | Expired |
| US5196694A | Temperature compensated self-referenced fiber optic microbend pressure transducer | Physics | 19 | Expired |
| US6519041B1 | Hydrogen sensor for fuel cell applications | Physics | 18 | Expired |
| US7743661B2 | Fiber optic MEMS seismic sensor with mass supported by hinged beams | Physics | 18 | Active |
| US5832157A | Fiber optic acoustic emission sensor | Physics | 18 | Expired |
| US4589286A | Fused silica diaphragm module for high temperature pressure transducers | Physics | 17 | Expired |
| US7940400B2 | Method and apparatus for continuous readout of fabry-perot fiber optic sensor | Physics | 16 | Active |
| US7355726B2 | Linear variable reflector sensor and signal processor | Physics | 14 | Expired |
| US7355684B2 | Interferometric signal conditioner for measurement of the absolute length of gaps in a fiber optic Fabry-Perot interferometer | Physics | 13 | Expired |
| US6097478A | Fiber optic acoustic emission sensor | Physics | 13 | Expired |
| US5020379A | Microbend fiber optic strain gauge | Physics | 12 | Expired |
| US7305158B2 | Interferometric signal conditioner for measurement of absolute static displacements and dynamic displacements of a Fabry-Perot interferometer | Physics | 12 | Expired |
| US7134346B2 | Differential pressure transducer with Fabry-Perot fiber optic displacement sensor | Physics | 12 | Expired |
| US7492463B2 | Method and apparatus for continuous readout of Fabry-Perot fiber optic sensor | Physics | 12 | Expired |
| US5206711A | Fluid opacity sensor | Physics | 11 | Expired |
| US4413879A | Method and apparatus for side launch excitation of selected modes in graded-index optical fibers | Emerging Cross-Sectional Technologies | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.