Thorn Security Limited
18Patents
12Active
18Granted
44Portfolio score
Filing activity: Sep 1, 1994 → Oct 6, 2016 · 8 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7940190B2 | Smoke detector | Physics | 15 | Active |
| US7843324B2 | Detection arrangements | Electricity | 12 | Active |
| US6255651A | Detector | Physics | 12 | Expired |
| US7633386B2 | Amplifier for multi-use of single environmental sensor | Electricity | 11 | Active |
| US9134180B2 | Detector | Physics | 7 | Active |
| US7106187B2 | Fire detector | Physics | 7 | Expired |
| US9153968B2 | Isolator circuit | Electricity | 6 | Active |
| US7948628B2 | Window cleanliness detection system | Physics | 5 | Active |
| US7956329B2 | Flame detector and a method | Physics | 5 | Expired |
| US8559006B2 | Particulate detector | Physics | 4 | Active |
| US8232869B2 | Identifying a plurality of devices | Electricity | 4 | Active |
| US5612537A | Detecting the presence of a fire | Physics | 4 | Expired |
| US10783771B2 | Smoke detector tester | Physics | 3 | Active |
| US10204508B2 | Fire detector drift compensation | Physics | 2 | Active |
| US7609154B2 | Testing a fire detector sensor | Physics | 2 | Expired |
| US9514635B2 | Interface circuit for distributed fire alarm in loop configuration | Electricity | 0 | Active |
| US6188278A | Amplification circuits | Physics | 0 | Expired |
| US8198997B2 | Fire gas detector-coding | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.