Peter Ehrhart
28Patents
12h-index
25Co-inventors
81Inventor score
Filing activity: Jul 20, 1989 → Dec 16, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5343971A | Electric vehicle with individually controlled drive electromotors | Emerging Cross-Sectional Technologies | 81 | Expired |
| US5478222A | Fluid pump having a pressure sealed motor chamber | Mechanical Engineering; Lighting; Heating | 72 | Expired |
| US6459185B1 | Electrical machine with permanent magnets | Electricity | 44 | Expired |
| US6384504B1 | Electric machine with a rotor constructed of permanent magnets and magnetic flux guides | Electricity | 40 | Expired |
| US5641276A | Electric pump for environmentally hazardous material | Electricity | 27 | Expired |
| US5128575A | Electric machine with permanent magnet rotor | Electricity | 25 | Expired |
| US6762520B1 | Induction-type electric machine | Electricity | 25 | Expired |
| US5578879A | Electric machine with fluid cooling | Electricity | 22 | Expired |
| US8316973B2 | Electric driving unit for a vehicle | Performing Operations; Transporting | 18 | Active |
| US7214155B2 | Electric drive unit for motor vehicles | Performing Operations; Transporting | 14 | Expired |
| US7315099B2 | Cooled electric drive unit for a motor vehicle | Performing Operations; Transporting | 12 | Expired |
| US5523914A | Inductive superconducting current storage | Electricity | 12 | Expired |
| US6750576B2 | Permanent magnet induced electric machine and method for operating such a machine | Electricity | 11 | Expired |
| US6278196A | Motor vehicle with electrical generator | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5011820A | Superconducting current accumulator with pulsed output | Emerging Cross-Sectional Technologies | 7 | Expired |
| US9221326B2 | Drive system for a land craft | Emerging Cross-Sectional Technologies | 6 | Active |
| US5486727A | Linear accelerator | Electricity | 6 | Expired |
| US6472966B1 | Superconducting heavy-current disconnector | Electricity | 6 | Expired |
| US5575087A | Shoe, especially a moccasin | Human Necessities | 5 | Expired |
| US6995489B2 | Electric machine | Electricity | 5 | Expired |
| US5200660A | Electric machine | Electricity | 3 | Expired |
| US5534739A | Electric machine | Electricity | 2 | Expired |
| US6959237B2 | Electric drive system, especially for vehicles | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6979917B2 | Permanent-magnetically excited electrical motor | Electricity | 1 | Expired |
| US10615591B2 | Power electronics unit | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.