Spring Spectrum L.P.
8Patents
7Active
8Granted
43Portfolio score
Filing activity: Jun 21, 2001 → Jul 19, 2013 · 3 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8417264B1 | Method and apparatus for determining location of a mobile station based on locations of multiple nearby mobile stations | Physics | 91 | Active |
| US7072666B1 | Method and system for communicating location in a cellular wireless system | Electricity | 82 | Expired |
| US8385216B1 | Method and system for vertical handoff with target traffic channel setup conveyed via source channel | Electricity | 16 | Active |
| US8184730B2 | Method and system for frequency band allocation based on frequency band usage measurements | Electricity | 2 | Active |
| US9271196B1 | Maintaining communication session information | Electricity | 0 | Active |
| US8554215B1 | Use of IMSI during femtocell registration to avoid identifier conflicts | Electricity | 0 | Active |
| US8290519B2 | Mobile network presence service with load-based notification throttling | Electricity | 0 | Active |
| US9609518B1 | Methods and system for changing mobile station settings upon hand-off to low-cost internet base station | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.