Mark Johnson
82Patents
14h-index
114Co-inventors
87Inventor score
Filing activity: Oct 26, 1987 → May 12, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6515623B2 | Enhanced location methodology for a location system | Physics | 266 | Expired |
| US5459458A | Virtual pager for general purpose data terminal | Electricity | 201 | Expired |
| US5745203A | Liquid crystal display device including multiple ambient light illumination modes with switchable holographic optical element | Physics | 89 | Expired |
| US6947880B2 | Method for improving accuracy of a velocity model | Physics | 60 | Expired |
| US7527739B2 | Apparatus, system, and method for multistage water separation | Emerging Cross-Sectional Technologies | 46 | Active |
| US5343437A | Memory having nonvolatile and volatile memory banks | Physics | 46 | Expired |
| US7506663B2 | Magnetic check valve | Emerging Cross-Sectional Technologies | 45 | Active |
| US7064660B2 | System and method for inferring an electronic rendering of an environment | Physics | 40 | Expired |
| US9676464B2 | Stabilized directional control systems and methods | Performing Operations; Transporting | 27 | Active |
| US7239876B2 | Method for increased location receiver sensitivity | Electricity | 27 | Expired |
| US6310576A | Method of identifying location using a master clock to synchronize time of arrival signals | Electricity | 23 | Expired |
| US7876706B2 | Method and apparatus for root node selection in an ad hoc network | Electricity | 18 | Active |
| US5023940A | Low-power DSP squelch | Electricity | 17 | Expired |
| USD772316S1 | Knife assembly | General | 16 | Active |
| US4922549A | Digital FM squelch detector | Electricity | 10 | Expired |
| US7563368B2 | Filtration device with releasable additive | Emerging Cross-Sectional Technologies | 10 | Active |
| US7697456B2 | Method and apparatus for omniscient root node selection in an ad hoc network | Electricity | 10 | Active |
| US5128971A | Frequency synchronization apparatus | Electricity | 10 | Expired |
| US6593883B2 | Timing estimation method and apparatus for a location system | Physics | 8 | Expired |
| US8291757B2 | Method and device for determining wind conditions around a sailboat | Physics | 8 | Active |
| US8301714B2 | Method and system for networking | Electricity | 8 | Active |
| USD772317S1 | Knife insert | General | 7 | Active |
| US10942028B2 | Video sensor fusion and model based virtual and augmented reality systems and methods | Physics | 7 | Active |
| US8425772B2 | Filtration device with releasable additive | Emerging Cross-Sectional Technologies | 7 | Active |
| US6988625B2 | Fluid filter with low-cost housing | Performing Operations; Transporting | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.