TM4 INC.
39Patents
31Active
39Granted
52Portfolio score
Filing activity: Jul 18, 2002 → Feb 13, 2017 · 14 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7614910B2 | Electrical connector | Electricity | 43 | Active |
| US6819016B2 | Liquid cooling arrangement for electric machines | Emerging Cross-Sectional Technologies | 24 | Expired |
| US8378534B2 | Liquid cooling arrangement for electric machines | Electricity | 22 | Active |
| US6992411B2 | Liquid cooling arrangement for electric machines | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6960851B2 | Cooling device including a biasing element | Electricity | 11 | Expired |
| US7049725B2 | Dynamoelectric machine stator and method for mounting prewound coils thereunto | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7471023B2 | Electric machine provided with an internal stator | Electricity | 9 | Active |
| US8167752B2 | Hybrid transmission for hybrid vehicles | Emerging Cross-Sectional Technologies | 6 | Active |
| US7513349B2 | Multi-position clutch | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US7898136B2 | Permanent magnet rotor assembly | Electricity | 5 | Active |
| US10270315B2 | Cast cooling arrangement for electric machines | Electricity | 4 | Active |
| US7402924B2 | Cooling assembly for electric machine | Electricity | 4 | Active |
| US7474021B2 | Cooling assembly for electric machine | Electricity | 4 | Expired |
| US6984949B2 | System and method to selectively prevent movements of an electric vehicle | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7641583B2 | Hybrid drive train for vehicle | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7906878B2 | Cooling assembly for large diameter electric machines | Electricity | 3 | Active |
| US9774244B2 | Power converter configured for limiting switching overvoltage | Emerging Cross-Sectional Technologies | 3 | Active |
| US8209851B2 | Apparatus for shaping rectangular wire coil head | Emerging Cross-Sectional Technologies | 2 | Active |
| US9882465B2 | Commutation cell, power converter and compensation circuit having dynamically controlled voltage gains | Electricity | 2 | Active |
| US7900760B2 | Multi-position clutch | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US10622881B2 | Circuits for softening switching phases in voltage converters | Emerging Cross-Sectional Technologies | 2 | Active |
| US9608543B2 | Turn-off overvoltage limiting for IGBT | Electricity | 1 | Active |
| US9748821B2 | Modular cooling arrangement for electric machine | Electricity | 1 | Active |
| US10205405B2 | Turn-off overvoltage limiting for IGBT | Electricity | 1 | Active |
| US7222686B2 | Drive train for series/parallel hybrid vehicle | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.