Robert Warren
4Patents
0Active
4Granted
25Portfolio score
Filing activity: Mar 31, 1992 → Oct 15, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5269227A | Motorized portable system and method for aiding persons in ascending or descending stairways | Human Necessities | 26 | Expired |
| US5363771A | Motorized portable system for aiding persons in ascending or descending stairways | Human Necessities | 13 | Expired |
| US5522322A | Motorized system and method for aiding physically-impaired persons in moving between different positions | Human Necessities | 4 | Expired |
| US7207855B2 | Joint | Mechanical Engineering; Lighting; Heating | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.