David Smith
44Patents
20h-index
29Co-inventors
85Inventor score
Filing activity: Mar 30, 1978 → Nov 12, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4591147A | System for elevating an exercise treadmill | Emerging Cross-Sectional Technologies | 95 | Expired |
| US4533136A | Pedal-operated, stationary exercise device | Emerging Cross-Sectional Technologies | 87 | Expired |
| US4592544A | Pedal-operated, stationary exercise device | Emerging Cross-Sectional Technologies | 63 | Expired |
| USD284597S | Inclined physical exerciser | General | 55 | Expired |
| USD280002S | Treadmill | General | 52 | Expired |
| US5888199A | Ear cleaning device with a flexion part | Human Necessities | 50 | Expired |
| USD283239S | Exercise treadmill | General | 48 | Expired |
| US7976597B2 | Cyclonic separation apparatus | Emerging Cross-Sectional Technologies | 41 | Active |
| US4695050A | Exercise rowing machine | Human Necessities | 37 | Expired |
| USD277304S | Rowing machine | General | 32 | Expired |
| US7655058B2 | Cyclonic vacuum cleaner | Emerging Cross-Sectional Technologies | 28 | Active |
| USD304358S | Stair climbing exercise apparatus | General | 27 | Expired |
| USD511231S1 | Attachment for cleaning appliance | General | 26 | Expired |
| USD280923S | Exercise bicycle | General | 26 | Expired |
| USD302451S | Stair climbing exercise apparatus | General | 23 | Expired |
| US6858140B2 | Processes and devices for water and wastewater treatment, including stationary cloth media filtration | Performing Operations; Transporting | 23 | Expired |
| USD279206S | Exercise bicycle | General | 22 | Expired |
| USD515756S1 | Floor tool for a cleaning appliance | General | 21 | Expired |
| US7955406B2 | Cyclonic separation apparatus | Performing Operations; Transporting | 21 | Active |
| USD268278S | Rowing machine | General | 20 | Expired |
| USD299369S | Skiing exerciser or similar article | General | 18 | Expired |
| USD268277S | Combined main beam and seat carriage for a rowing machine | General | 17 | Expired |
| USD314597S | Low impact stair climbing exercise apparatus | General | 16 | Expired |
| USD300046S | Exercise bicycle | General | 15 | Expired |
| USD283530S | Exercise rowing machine | General | 14 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.