Robert E. Simpson
17Patents
9h-index
20Co-inventors
72Inventor score
Filing activity: Jan 9, 1975 → May 15, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4414112A | Oil/water separator | Performing Operations; Transporting | 52 | Expired |
| US5096759A | Laminated roofing sheet | Emerging Cross-Sectional Technologies | 43 | Expired |
| US4352353A | Protective clothing | Human Necessities | 41 | Expired |
| US4117552A | Protective clothing | Human Necessities | 38 | Expired |
| US8500719B1 | Catheter support | Human Necessities | 37 | Active |
| US7297301B1 | Process for transforming pre-used asphaltic roofing shingles into products | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4096944A | Cartridge for grouting an anchor element in a hole of a support structure | Mechanical Engineering; Lighting; Heating | 32 | Expired |
| US5142837A | Roof structure | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4936938A | Process of making roofing material | Performing Operations; Transporting | 14 | Expired |
| US8624215B2 | Phase change memory devices and methods comprising gallium, lanthanide and chalcogenide compounds | Physics | 5 | Active |
| US3932738A | Transition monitor for a unit transition counter | Physics | 4 | Expired |
| US4025769A | Apparatus for convoluting complex functions expressed as fourier series | Physics | 3 | Expired |
| US4497578A | Machine for mixing and injecting water and grout into a roof bolt hole | Performing Operations; Transporting | 3 | Expired |
| USD453909S1 | Ceramic desktop zen rock garden | General | 2 | Expired |
| US9029823B2 | Phase change memory devices and methods comprising gallium, lanthanide and chalcogenide compounds | Physics | 2 | Active |
| US11529494B1 | Catheter support | Human Necessities | 0 | Active |
| US10315004B1 | Catheter support | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.