Alfred Ernst
13Patents
4h-index
10Co-inventors
57Inventor score
Filing activity: Mar 8, 1976 → Sep 15, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4805962A | Seat shell for a motor vehicle seat | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5309754A | Hardness tester and method for measuring the hardness of metallic materials | Physics | 12 | Expired |
| US4023401A | Hand-operable durometer | Physics | 7 | Expired |
| US7454960B2 | Hardness tester with a loading structure of the indenter independent of the stress frame connecting the indenter to the anvil | Physics | 5 | Expired |
| US4262525A | Hardness testing apparatus provided with a safety stop device | Physics | 4 | Expired |
| US4444045A | Hand-operated hardness meter | Physics | 3 | Expired |
| US4107978A | Durometer according to Rockwell system | Performing Operations; Transporting | 2 | Expired |
| US5571954A | Electrical resistance hardness tester for metallic materials | Physics | 2 | Expired |
| US7310994B2 | Method and device for obtaining a determined flow resistance of a flow channel by means of a measuring bridge | Performing Operations; Transporting | 2 | Expired |
| US4899578A | Driving device for a hardness measuring instrument | Physics | 1 | Expired |
| US7743645B2 | Method and device for obtaining a determined flow resistance of a flow channel by means of a measuring bridge | Performing Operations; Transporting | 0 | Active |
| US9546825B2 | Plate heat exchanger | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US4182162A | Durometer | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.