David B. Spencer
23Patents
16h-index
16Co-inventors
78Inventor score
Filing activity: Jul 17, 1973 → Jan 21, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3948650A | Composition and methods for preparing liquid-solid alloys for casting and casting methods employing the liquid-solid alloys | Emerging Cross-Sectional Technologies | 84 | Expired |
| US6266390A | High speed materials sorting using x-ray fluorescence | Physics | 74 | Expired |
| US7763820B1 | Sorting pieces of material based on photonic emissions resulting from multiple sources of stimuli | Performing Operations; Transporting | 71 | Active |
| US7564943B2 | Method and apparatus for sorting materials according to relative composition | Physics | 64 | Active |
| US8855809B2 | Material sorting technology | Physics | 56 | Active |
| US6519315B2 | High speed materials sorting using x-ray fluorescence | Physics | 52 | Expired |
| US7099433B2 | Method and apparatus for sorting materials according to relative composition | Physics | 48 | Expired |
| US6888917B2 | High speed materials sorting using x-ray fluorescence | Physics | 45 | Expired |
| US3954455A | Liquid-solid alloy composition | Chemistry; Metallurgy | 44 | Expired |
| US7848484B2 | Method and apparatus for sorting materials according to relative composition | Physics | 37 | Active |
| US8144831B2 | Method and apparatus for sorting materials according to relative composition | Physics | 35 | Active |
| US8476545B2 | Sorting pieces of material based on photonic emissions resulting from multiple sources of stimuli | Performing Operations; Transporting | 32 | Active |
| US8553838B2 | High speed materials sorting using X-ray fluorescence | Physics | 30 | Active |
| US7616733B2 | High speed materials sorting using x-ray fluorescence | Physics | 26 | Active |
| US7978814B2 | High speed materials sorting using X-ray fluorescence | Physics | 25 | Active |
| US10368872B2 | System and method for low profile occlusion balloon catheter | Human Necessities | 24 | Active |
| US9956609B1 | Metal sorting, melting and fabrication apparatus and methods | Emerging Cross-Sectional Technologies | 12 | Active |
| US11253264B2 | System and method for low profile occlusion balloon catheter | Human Necessities | 9 | Active |
| US10149962B2 | System and method for low-profile occlusion balloon catheter | Human Necessities | 8 | Active |
| US11672951B2 | System and method for low-profile occlusion balloon catheter | Human Necessities | 4 | Active |
| US11857737B2 | System and method for low-profile occlusion balloon catheter | Human Necessities | 4 | Active |
| US8861675B2 | Method and apparatus for sorting materials according to relative composition | Physics | 3 | Active |
| USD1066673S1 | Vascular occlusion balloon | General | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.