Mahle GmbH
🏢 View company profile →146Patents
7Active
146Granted
40Portfolio score
Filing activity: May 28, 1974 → May 11, 2016 · 6 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5778533A | Method of producing a one-part cooling duct piston | Emerging Cross-Sectional Technologies | 45 | Expired |
| US5560283A | Piston-Cylinder assembly of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 41 | Expired |
| US5052280A | Coolable trunk piston for internal combustion engines | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US6026777A | Piston having a barrel of forged steel and a cooling channel | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5261363A | Piston with separate head and skirt | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4334507A | Piston for an internal combustion engine and method for producing same | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5257603A | Coated piston and process for applying coating | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5516425A | Oil filter for the cleaning of lubricating oil | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US3971355A | Piston rod-connecting rod interconnections for internal combustion engines | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4704950A | Plunger piston for internal combustion engines | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US6659062B1 | Cooled piston for internal combustion engines | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5546896A | Articulated, oil-cooled piston for internal combustion engines | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US6722263B2 | Bottom covering of a cooling chamber for pistons of internal combustion engines | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6453797B1 | Piston for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US6729291B1 | Multipart cooled piston for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US6467397B1 | Constructed piston or piston consisting of components that are welded or soldered together | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US6698391B1 | Multipart cooled piston for a combustion engine | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US7131418B2 | Cooled piston for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US6892689B2 | Cooling duct piston for a direct-injection diesel engine | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5357920A | Cooled multi-component piston for internal combustion engines | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US6938603B2 | Method for the production of a one-piece piston for an internal combustion engine | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5211101A | Piston with oval shaped lands | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US6763758B2 | Multi-part cooled piston for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US7051684B2 | Oil inlet for an internal combustion engine piston that is provided with a cooling duct | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US6772846B1 | Method for drilling shaker bores into the cooling channel of a single-part piston | Emerging Cross-Sectional Technologies | 15 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.