Robert Ulrich
9Patents
6h-index
7Co-inventors
52Inventor score
Filing activity: Apr 17, 1996 → Nov 1, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6155401A | Drive for an escalator | Performing Operations; Transporting | 17 | Expired |
| US5848668A | Portable lifting system for easy movement of moderately heavy items | Performing Operations; Transporting | 13 | Expired |
| US5611417A | Apparatus for stopping a passenger conveyor | Performing Operations; Transporting | 12 | Expired |
| US6142286A | Floor covering for conveying equipment for persons | Performing Operations; Transporting | 8 | Expired |
| US7234583B2 | Escalator or moving walk | Performing Operations; Transporting | 6 | Expired |
| US6471033B2 | Lubricating device for an escalator or a moving walkway | Performing Operations; Transporting | 6 | Expired |
| US6260687A | Equipment and method for simplified roller bearing exchange at escalators and moving walkways | Performing Operations; Transporting | 5 | Expired |
| US6655521B2 | Escalator or moving walkway | Performing Operations; Transporting | 2 | Expired |
| US7451867B2 | Escalator or moving walk with shaft-bearing and method of mounting and dismounting this escalator | Performing Operations; Transporting | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.