Mark D. Johnson
24Patents
10h-index
41Co-inventors
75Inventor score
Filing activity: Apr 9, 1981 → Apr 17, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5304141A | Method and apparatus for inducing anesthesia | Human Necessities | 102 | Expired |
| US4741176A | Beverage cooler | Mechanical Engineering; Lighting; Heating | 68 | Expired |
| US5232442A | Method and apparatus for inducing anesthesia | Human Necessities | 57 | Expired |
| US4869844A | High solids liquid alkaline cleaners | Chemistry; Metallurgy | 21 | Expired |
| US8402798B2 | Locking clamp | Emerging Cross-Sectional Technologies | 18 | Active |
| US7497705B2 | Lockout device | Electricity | 18 | Active |
| US4396032A | Safety underwater pressure regulator | Emerging Cross-Sectional Technologies | 13 | Expired |
| US7752876B2 | Lockout device | Emerging Cross-Sectional Technologies | 12 | Active |
| USD648207S1 | Keyhead cover | General | 12 | Expired |
| US7197904B2 | Lockout device | Emerging Cross-Sectional Technologies | 11 | Expired |
| USD518093S1 | Printer | General | 9 | Expired |
| US4824586A | Metal working lubricant | Chemistry; Metallurgy | 7 | Expired |
| US8459070B2 | Combination locks with improved code-changing features | Emerging Cross-Sectional Technologies | 5 | Active |
| US9093772B2 | Lockout device | Emerging Cross-Sectional Technologies | 4 | Active |
| US9988186B1 | Tool storage device | Performing Operations; Transporting | 4 | Active |
| US7002820B2 | Semiconductor storage device | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7313945B2 | Cantilevers for sensing fluid properties | Physics | 2 | Expired |
| US7359198B2 | System and method for inducing turbulence in fluid for dissipating thermal energy of electronic circuitry | Electricity | 2 | Expired |
| US7474537B2 | Circuit board with multiple layer interconnect and method of manufacture | Electricity | 1 | Expired |
| US11118658B1 | Device and method with multiple torque and speed ranges | Mechanical Engineering; Lighting; Heating | 1 | Active |
| USD841559S1 | Lift tool box | General | 0 | Active |
| US11268714B2 | System and method for controlling building fluid distribution | Emerging Cross-Sectional Technologies | 0 | Active |
| US9039431B2 | Lockout device | General | 0 | Revoked |
| US10344493B2 | Cleaning head for an in-floor pool cleaning system | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.