Fred Martensen
8Patents
4h-index
10Co-inventors
46Inventor score
Filing activity: Dec 14, 2007 → Jun 8, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8549552B2 | Methods and apparatus to monitor media exposure in vehicles | Electricity | 113 | Active |
| US8327396B2 | Methods, systems, and apparatus for multi-purpose metering | Electricity | 34 | Active |
| US9055336B2 | Methods, systems and apparatus for multi-purpose metering | Electricity | 11 | Active |
| US8752081B2 | Methods, systems and apparatus for multi-purpose metering | Electricity | 7 | Active |
| US9288268B2 | Methods and apparatus to monitor shoppers in a retail environment | Electricity | 3 | Active |
| USRE45786E1 | Methods and apparatus to monitor media exposure in vehicles | General | 1 | Active |
| US9185457B2 | Methods, systems and apparatus for multi-purpose metering | Electricity | 1 | Active |
| USRE46329E1 | Methods and apparatus to monitor media exposure in vehicles | General | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.