Ulf Tolfsen
21Patents
8h-index
11Co-inventors
72Inventor score
Filing activity: Nov 17, 1975 → May 6, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7676854B2 | Helmet, helmet liner and method for manufacturing the same | Performing Operations; Transporting | 69 | Active |
| USD519423S1 | Walker | General | 57 | Expired |
| USD503909S1 | Walker | General | 50 | Expired |
| US6260920A | Device for releasable attachments of objects to a mobile unit | Performing Operations; Transporting | 37 | Expired |
| US5579202A | Transformer device | Electricity | 37 | Expired |
| US7182179B2 | Walker with adjustable handlebar | Emerging Cross-Sectional Technologies | 22 | Expired |
| USD515458S1 | Scooter with cabin | General | 15 | Expired |
| US6802537B1 | Arrangement and method for height adjustment of the upper attachment point of a safety belt | Performing Operations; Transporting | 15 | Expired |
| US4052772A | Pillar loop for belts, such as seat belts in cars or the like | Emerging Cross-Sectional Technologies | 8 | Expired |
| USD480900S1 | Bed support | General | 8 | Expired |
| US5555609A | Safety belt buckle | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4035595A | Electrical switch for safety belt locking devices | Performing Operations; Transporting | 8 | Expired |
| US6073785A | Container dispensing apparatus | Performing Operations; Transporting | 6 | Expired |
| US4492007A | Fastening means for safety belts | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4196499A | Fastening means for safety belts | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4757969A | Safety belt system for cars | Performing Operations; Transporting | 4 | Expired |
| US4733443A | Fastening means for safety belts | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6032475A | Refrigeration apparatus | Human Necessities | 2 | Expired |
| USD480887S1 | Bed | General | 1 | Expired |
| US4670951A | Fastening means for a safety belt for a car or the like | Emerging Cross-Sectional Technologies | 1 | Expired |
| USD531937S1 | Mobility vehicle | General | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.