Stephen W. Smith
55Patents
17h-index
47Co-inventors
84Inventor score
Filing activity: May 31, 1979 → May 17, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4893067A | Direct current motor speed control | Emerging Cross-Sectional Technologies | 139 | Expired |
| US5430607A | Rugged modular portable computer including modules hinged along an edge | Electricity | 83 | Expired |
| US4737661A | Variable speed trigger switch | Electricity | 52 | Expired |
| US6371033B1 | High capacity integrated railway car truck | Mechanical Engineering; Lighting; Heating | 52 | Expired |
| US5511491A | Railway car | Performing Operations; Transporting | 47 | Expired |
| US5392717A | Railway car | Performing Operations; Transporting | 46 | Expired |
| US6871600B2 | Pultruded panel | Performing Operations; Transporting | 40 | Expired |
| US5584252A | Railway freight car | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4734629A | Variable speed trigger switch | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6722287B2 | Roof assembly and airflow management system for a temperature controlled railway car | Performing Operations; Transporting | 27 | Expired |
| US8138778B1 | Apparatus for high density low cost automatic test applications | Physics | 22 | Active |
| US6302031A | Sidewall for a railway car | Performing Operations; Transporting | 22 | Expired |
| US6367391B1 | Railway car with composite box structure formed from molded components | Emerging Cross-Sectional Technologies | 22 | Expired |
| USD291292S | Child's racing bike | General | 21 | Expired |
| US4649245A | Variable speed trigger switch | Electricity | 20 | Expired |
| US4875553A | Modular elevator cab construction | Performing Operations; Transporting | 19 | Expired |
| US6704991B1 | Method for forming a railway car with improved crosstie connections | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5710400A | Rotary multiple capacitive switch | Electricity | 17 | Expired |
| USD343671S | Swing seat | General | 16 | Expired |
| US6575102B2 | Temperature controlled railway car | Performing Operations; Transporting | 16 | Expired |
| US5562046A | Load bearing crossbearer connection | Performing Operations; Transporting | 16 | Expired |
| US5341747A | Railway gondola car | Performing Operations; Transporting | 15 | Expired |
| US4348962A | Railway hopper car bolster assembly | Performing Operations; Transporting | 15 | Expired |
| US6237505A | Large capacity car body for pressure discharge railway hopper cars | Performing Operations; Transporting | 14 | Expired |
| US6941875B2 | Temperature controlled railway car | Performing Operations; Transporting | 14 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.