Robert S. Johnson
24Patents
6h-index
23Co-inventors
69Inventor score
Filing activity: Jul 25, 1983 → Jul 28, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD280769S | Sponge mop | General | 21 | Expired |
| US4516287A | Angled roller mop | Human Necessities | 18 | Expired |
| US5320768A | Hydroxy ether amine friction modifier for use in power transmission fluids and anti-wear additives for use in combination therewith | Chemistry; Metallurgy | 17 | Expired |
| USD867568S1 | Air filter | General | 14 | Active |
| US8443429B1 | Integrated sign on | Electricity | 13 | Active |
| US4983203A | Cooling device for glass container forming machine | Chemistry; Metallurgy | 10 | Expired |
| US6749755B2 | Water separation from solvent | Physics | 5 | Expired |
| US8408183B2 | Ignition and fuel shutoff for engine | Mechanical Engineering; Lighting; Heating | 5 | Active |
| USD876600S1 | Air filter | General | 5 | Active |
| US5358542A | Glass container forming machine including neck ring mold cooling | Chemistry; Metallurgy | 5 | Expired |
| US6264895A | Evaporator | Performing Operations; Transporting | 5 | Expired |
| US6027638A | Automatic filtration and extraction device and method | Performing Operations; Transporting | 5 | Expired |
| USD896945S1 | Air filter | General | 5 | Active |
| US5642701A | Engine cylinder head assembly having planar and cast components | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US5753105A | Automatic filtration and extraction device and method | Physics | 3 | Expired |
| US11260328B2 | Cyclonic air filter assembly for an engine | Performing Operations; Transporting | 2 | Active |
| US8528747B2 | Solid phase extraction disk and method of manufacture | Performing Operations; Transporting | 1 | Active |
| US10422730B2 | Liquid inlet device | Performing Operations; Transporting | 1 | Active |
| US11712649B2 | Cyclonic air filter assembly for an engine | Performing Operations; Transporting | 1 | Active |
| US12251655B2 | Cyclonic air filter assembly for an engine | Performing Operations; Transporting | 0 | Active |
| US8313953B2 | Sample collection system and method | Emerging Cross-Sectional Technologies | 0 | Active |
| US11377996B2 | Muffler with baffle defining multiple chambers | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US8124422B2 | Sample collection system and method | Emerging Cross-Sectional Technologies | 0 | Active |
| US7935536B2 | System for water removal and solvent evaporation | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.