Ralf Drews
8Patents
5h-index
9Co-inventors
56Inventor score
Filing activity: May 22, 1995 → Jun 21, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5601078A | Breathing apparatus with a display unit | Physics | 140 | Expired |
| US5515846A | Respirator with a breathing filter | Human Necessities | 31 | Expired |
| US7336191B2 | Gas-measuring system | Physics | 7 | Active |
| US5704348A | Breathing valve | Human Necessities | 7 | Expired |
| US5625902A | Protective hood made of an elastic material | Human Necessities | 5 | Expired |
| US8212211B2 | System for protecting and/or guiding persons in dangerous situations | Electricity | 5 | Active |
| US6338341B1 | Protective breathing mask | Human Necessities | 4 | Expired |
| US12312120B2 | Closure device for flexible containers and a method for closing flexible containers | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.