ERNST GROB AG
20Patents
7Active
20Granted
38Portfolio score
Filing activity: Jun 15, 1977 → Nov 14, 2019 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4872250A | Method for fabricating a dished hollow body possessing a linear or helical inner toothing | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6089065A | Process and arrangement for the cold forming of hollow workpieces | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4796345A | Method of fabricating a rim gear, such as a starter rim gear made of sheet metal | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5001916A | Method for the calibrated cross-section reduction of a workpiece rotating during such method. | Performing Operations; Transporting | 9 | Expired |
| US4116032A | Method and apparatus for manufacturing straight or inclined toothed machine elements, especially spur gears by cold working | Performing Operations; Transporting | 7 | Expired |
| US5471858A | Apparatus and process for the production of a hollow workpiece being profiled in a straight or helical manner relative to the workpiece axis | Performing Operations; Transporting | 6 | Expired |
| US5765419A | Method and apparatus for a rolling of hollow articles | Performing Operations; Transporting | 5 | Expired |
| US8117884B2 | Method for producing internal and external toothings on thin-walled, cylindrical hollow parts | Emerging Cross-Sectional Technologies | 4 | Active |
| US7861572B2 | Method and device for making at least partly profiled tubes | Performing Operations; Transporting | 4 | Active |
| US6345526B1 | Punching and stamping machine and method of making parts using same | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5355706A | Process for the production of a hollow workpiece being profiled at least internally in a straight or helical manner relative to the workpiece axis | Performing Operations; Transporting | 3 | Expired |
| US7874760B2 | Tooth profile of a spline shaft | Emerging Cross-Sectional Technologies | 3 | Expired |
| US10072718B2 | Composite brake disc and method and apparatus for manufacture of the same | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US7955020B2 | Grooved profile for a hub shaft connection | Emerging Cross-Sectional Technologies | 2 | Expired |
| US7562549B2 | Device and method for producing tooth-like profiled sections on workpieces | Performing Operations; Transporting | 2 | Expired |
| US9174291B2 | Apparatus and method for manufacturing thick-walled hollow wheels having an internal gear toothing | Emerging Cross-Sectional Technologies | 1 | Active |
| US10655693B2 | Manufacturing method for a composite brake disc as well as a corresponding composite brake disc | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US5546781A | Process for the production of a toothed rack via cold forming, the rack produced thereby, and an apparatus for practicing the process | Performing Operations; Transporting | 1 | Expired |
| US12179254B2 | Apparatus and method for profiling workpieces by cold forming | Performing Operations; Transporting | 0 | Active |
| US11498114B2 | Thin-walled hollow wheels with internal and external toothing, and apparatus and method for manufacturing the same | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.