Walter E. Schaffner
19Patents
15h-index
15Co-inventors
71Inventor score
Filing activity: Dec 18, 1985 → Dec 11, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4968615A | Deoxyribonucleic acid segment from a virus | Chemistry; Metallurgy | 191 | Expired |
| US5944131A | Mid-wheel drive power wheelchair | Emerging Cross-Sectional Technologies | 171 | Expired |
| US6129165A | Curb-climbing power wheelchair | Emerging Cross-Sectional Technologies | 136 | Expired |
| US6543798B2 | Anti-tip caster suspension for a wheelchair | Human Necessities | 120 | Expired |
| US6199647A | Mid-wheel drive power wheelchair | Emerging Cross-Sectional Technologies | 89 | Expired |
| US5695021A | Electrically-powered scooter for personal transport | Performing Operations; Transporting | 85 | Expired |
| US6176335A | Power wheelchair | Emerging Cross-Sectional Technologies | 85 | Expired |
| USD404693S | Power wheelchair | General | 80 | Expired |
| USD397645S | Motorized wheelchair | General | 79 | Expired |
| US6000758A | Reclining lift chair | Emerging Cross-Sectional Technologies | 73 | Expired |
| US6640916B2 | Mid-wheel drive power wheelchair | Emerging Cross-Sectional Technologies | 73 | Expired |
| US6186252A | Foldable midwheel drive power chair | Emerging Cross-Sectional Technologies | 71 | Expired |
| US7490683B2 | Curb-climbing power wheelchair | Emerging Cross-Sectional Technologies | 43 | Active |
| US7104346B2 | Power wheelchair | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5849522A | Enhancer for eukaryotic expression systems | Chemistry; Metallurgy | 15 | Expired |
| US6218140A | Enhancer for eukaryotic expression systems | Chemistry; Metallurgy | 13 | Expired |
| USD384939S | Chair control | General | 11 | Expired |
| US6749262B2 | Adjustable hinge and support structure | Human Necessities | 10 | Expired |
| US4983518A | Eukaryotic expression vectors with multimeric enhancer segments, a process for the preparation thereof and the use thereof | Chemistry; Metallurgy | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.