Roland Ullmann
107Patents
21h-index
37Co-inventors
90Inventor score
Filing activity: Nov 21, 1975 → May 30, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5327648A | Electric hair cutting apparatus | Performing Operations; Transporting | 64 | Expired |
| US5343621A | Shaving apparatus | Performing Operations; Transporting | 54 | Expired |
| US6530793B2 | Multipole connector assembly for low-voltage appliances | Electricity | 49 | Expired |
| US6357118B1 | Electric razor | Performing Operations; Transporting | 46 | Expired |
| USD526487S1 | Head and neck unit of a toothbrush | General | 43 | Expired |
| USD375016S | Thermal coffee pot | General | 41 | Expired |
| USD547951S1 | Handle for a toothbrush | General | 32 | Expired |
| USD258993S | Dryshaver | General | 28 | Expired |
| USD590542S1 | Electric shaver | General | 28 | Expired |
| USD513341S1 | Cleaning device for an electric shaver | General | 28 | Expired |
| USD355329S | Coffee-pot | General | 27 | Expired |
| USD354879S | Coffee-pot | General | 27 | Expired |
| US4669189A | Hair cutting apparatus, in particular electric hair cutting apparatus | Performing Operations; Transporting | 27 | Expired |
| US6226871A | Dry shaving apparatus | Performing Operations; Transporting | 27 | Expired |
| USD590543S1 | Electric shaver | General | 26 | Expired |
| USD245629S | Dry shaver | General | 25 | Expired |
| USD286452S | Electric dry shaver | General | 23 | Expired |
| USD551801S1 | Electric shaver | General | 23 | Expired |
| USD432265S | Hair cutting machine | General | 22 | Expired |
| US5701673A | Dry shaving apparatus with pivotally mounted long-hair trimmer | Electricity | 22 | Expired |
| USD286328S | Electric dry shaver | General | 21 | Expired |
| US5485778A | Beverage brewing apparatus | Human Necessities | 20 | Expired |
| USD270385S | Electric shaver | General | 19 | Expired |
| US6505404B2 | Power driven hair clipper | Performing Operations; Transporting | 18 | Expired |
| USD341907S | Dry shaver | General | 18 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.