Harold W. Schaefer
8Patents
6h-index
5Co-inventors
45Inventor score
Filing activity: Apr 6, 1977 → Jun 3, 1980
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4249281A | Self-propelled vacuum cleaner | Human Necessities | 30 | Expired |
| US4209873A | Brush-beater for a vacuum cleaner and method for making the same | Human Necessities | 27 | Expired |
| USD261515S | Pressure spray carpet cleaner | General | 12 | Expired |
| US4312542A | Method of making a brush-beater for a vacuum cleaner | Emerging Cross-Sectional Technologies | 8 | Expired |
| USD252332S | Wide track vacuum cleaner housing | General | 7 | Expired |
| US4311493A | Vacuum cleaner bag assembly | Performing Operations; Transporting | 7 | Expired |
| US4240812A | Vacuum cleaner bag assembly | Performing Operations; Transporting | 5 | Expired |
| USD253891S | Casing for a vacuum cleaner | General | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.