Mark A. Johnston
37Patents
11h-index
50Co-inventors
78Inventor score
Filing activity: Apr 10, 1986 → Aug 17, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9033973B2 | System and method for DC tissue impedance sensing | Human Necessities | 244 | Active |
| US5190112A | Rotary hoe extension | Human Necessities | 70 | Expired |
| US5189620A | Control system for gas turbine helicopter engines and the like | Physics | 45 | Expired |
| US4947770A | Coulter and fertilizer applicator linkage arrangement | Emerging Cross-Sectional Technologies | 33 | Expired |
| US7168376B2 | Seed boot for a seeding machine | Human Necessities | 28 | Expired |
| US5303142A | Control system for gas turbine helicopter engines and the like | Physics | 25 | Expired |
| US8051289B2 | Electronic document management and delivery | Physics | 21 | Active |
| US8617154B2 | Current-fed push-pull converter with passive voltage clamp | Human Necessities | 19 | Active |
| US4986200A | Depth gauge wheel | Human Necessities | 14 | Expired |
| US5046923A | Helicopter autorotation detection and recovery | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US7487732B2 | Boot with scraper for a fertilizer opener in an agricultural machine | Human Necessities | 11 | Active |
| US5595131A | Flexible and resilient supports for a grain box | Emerging Cross-Sectional Technologies | 7 | Expired |
| US8006996B1 | Collapsible work cart | Performing Operations; Transporting | 7 | Active |
| US4817046A | Detection of engine failure in a multi-engine aircraft | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US9265560B2 | System and method for detecting and suppressing arc formation during an electrosurgical procedure | Human Necessities | 5 | Active |
| US8340793B2 | Architecture using integrated backup control and protection hardware | Physics | 4 | Active |
| US9770283B2 | Systems and methods for improving efficiency of electrosurgical generators | Human Necessities | 4 | Active |
| US9625894B2 | Multi-channel control switchover logic | Physics | 3 | Active |
| US9839469B2 | Systems and methods for improving efficiency of electrosurgical generators | Human Necessities | 3 | Active |
| US9449746B2 | Methods of manufacturing planar transformers | Emerging Cross-Sectional Technologies | 2 | Active |
| US9483032B2 | Multi-channel protection logic | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US5055317A | Method for coating elongated workpieces | Performing Operations; Transporting | 2 | Expired |
| US10869712B2 | System and method for high frequency leakage reduction through selective harmonic elimination in electrosurgical generators | Human Necessities | 1 | Active |
| US11090106B2 | Control systems for electrosurgical generator | Human Necessities | 1 | Active |
| US9196414B2 | Planar transformers having reduced termination losses | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.