Douglas E. Johnson
18Patents
8h-index
22Co-inventors
72Inventor score
Filing activity: Oct 28, 1980 → Oct 15, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4529958A | Electrical resistor | Electricity | 34 | Expired |
| US5737797A | Central vacuum with acoustical damping | Human Necessities | 33 | Expired |
| US8663133B2 | Portable system for assisting body movement | Human Necessities | 31 | Active |
| US5135670A | Sulfurized olefin extreme pressure/antiwear additives and compositions thereof | Chemistry; Metallurgy | 17 | Expired |
| US9649243B2 | Body lift-assist walker device | Human Necessities | 15 | Active |
| US6218798A | Central vacuum interface for air exchanger | Human Necessities | 14 | Expired |
| US9554964B1 | Suspension and body attachment system and differential pressure suit for body weight support devices | Performing Operations; Transporting | 12 | Active |
| US6052863A | Central vacuum cleaner muffler | Human Necessities | 12 | Expired |
| US5200101A | Arylamine/hindered phenol, acid anhydride and thioester-derived multifunctional antioxidant, antiwear and rust inhibiting additives | Chemistry; Metallurgy | 7 | Expired |
| US9561149B2 | Suspension and body attachment system and differential pressure suit for body weight support devices | Human Necessities | 7 | Active |
| US4467311A | Electrical resistor | Electricity | 5 | Expired |
| US4338978A | Lead chloride battery plate | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6321546A | Heat transfer system | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US8623795B2 | Method for maintaining antiwear performance of turbine oils containing polymerized amine antioxidants and for improving the deposit formation resistance performance of turbine oils containing monomeric and/or polymeric antioxidants | Chemistry; Metallurgy | 1 | Active |
| US8618031B2 | Method for improving the deposit formation resistance performance of turbine oils containing amine antioxidants | Chemistry; Metallurgy | 1 | Active |
| US7879778B2 | Synthetic phenolic ether lubricant base stocks and lubricating oils comprising such base stocks mixed with co-base stocks and/or additives | Chemistry; Metallurgy | 0 | Active |
| US9445880B2 | Portable system for assisting body movement | Human Necessities | 0 | Active |
| US9492258B2 | Portable system for assisting body movement | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.