Wherenet Corp
28Patents
2Active
28Granted
37Portfolio score
Filing activity: Sep 23, 1998 → Feb 11, 2008 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6127976A | Distributed network for multi-lateration with circularly polarized antenna for hemispherical coverage | Physics | 150 | Expired |
| US6593885B2 | Low cost DTOA location processing system based on multiple readers-to-single processor architecture | Physics | 123 | Expired |
| US6380894B1 | Multi-lateration system with automatic calibration and error removal | Physics | 114 | Expired |
| US6121926A | Radio geo-location system with advanced first received wavefront arrival determination | Physics | 113 | Expired |
| US6892054B2 | Interference suppression for wireless local area network and location system | Electricity | 110 | Expired |
| US6366242B1 | Computer workstation tool for displaying performance estimate of tagged object geo-location system for proposed geometry layout of tag transmission readers | Physics | 97 | Expired |
| US7755541B2 | System and method for tracking vehicles and containers | Physics | 89 | Active |
| US6655582B2 | System and method for identifying objects using single connection line | Physics | 64 | Expired |
| US7190271B2 | Location system and method that achieves time synchronized network performance using unsynchronized receiver clocks | Physics | 59 | Expired |
| US6657586B2 | System and method for locating an object using global positioning system receiver | Physics | 53 | Expired |
| US6434194B1 | Combined OOK-FSK/PPM modulation and communication protocol scheme providing low cost, low power consumption short range radio link | Electricity | 50 | Expired |
| US7046657B2 | Wireless local area network system with mobile access point station determination | Electricity | 45 | Expired |
| US6317082A | Wireless call tag based material replenishment system | Physics | 41 | Expired |
| US6393045B1 | Spread spectrum baseband modulation of magnetic fields for communications and proximity sensing | Physics | 38 | Expired |
| US6987744B2 | Wireless local area network with geo-location capability | Physics | 37 | Expired |
| US6853687B2 | Proximity-based magnetic field generator for controlling operation of RF burst-transmitting tags of geolocation system | Physics | 33 | Expired |
| US6577275B2 | Transactions and business processes executed through wireless geolocation system infrastructure | Physics | 32 | Expired |
| US6502005B1 | Elapsed time clock for part call tag-based replenishment system | Physics | 28 | Expired |
| US6268723A | Magnetic field emission and differential receiver coil configuration for discriminating response magnetic field from transponder tag | Physics | 27 | Expired |
| US6812839B1 | Use of rotating magnetic field to enhance communication with RF burst-transmitting tags of object location system | Physics | 27 | Expired |
| US6859485B2 | Geolocation system with controllable tags enabled by wireless communications to the tags | Physics | 22 | Expired |
| US7218229B2 | Location system and method that achieves time synchronized network performance with nodes divided into separate networks | Physics | 18 | Expired |
| US6366626B1 | Sub-symbol matched filter-based frequency error processing for spread spectrum communication systems | Electricity | 15 | Expired |
| US6349116B1 | Data communication system harnessing frequency shift keyed magnetic field | Physics | 15 | Expired |
| US7212563B2 | Real-time locating system and method using timing signal | Electricity | 14 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.