SimplexGrinnell LP
62Patents
49Active
62Granted
52Portfolio score
Filing activity: Apr 25, 2001 → Feb 14, 2013 · 37 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7400226B2 | Emergency lighting system with improved monitoring | Electricity | 27 | Expired |
| US7006003B2 | Multi-candela emergency strobe light | Physics | 21 | Expired |
| US7233253B2 | Multiwavelength smoke detector using white light LED | Physics | 18 | Expired |
| US6737967B2 | Wireless walk through test system | Physics | 18 | Expired |
| US7474227B2 | Multiwavelength smoke detector using white light LED | Physics | 16 | Active |
| US8228182B2 | Self-testing notification appliance | Physics | 16 | Active |
| US7688212B2 | Method and apparatus for providing occupancy information in a fire alarm system | Physics | 15 | Active |
| US7508303B2 | Alarm system with speaker | Electricity | 13 | Active |
| US6950016B2 | Walk through test system | Physics | 13 | Expired |
| US7714733B2 | Emergency warning system integrated with building hazard alarm notification system | Physics | 12 | Active |
| US7167088B2 | Wireless walk through test system | Physics | 10 | Expired |
| US7369037B2 | Programmable multicandela notification device | Physics | 10 | Expired |
| US7999666B2 | Emergency lighting system with improved monitoring | Electricity | 10 | Active |
| US7333010B2 | Method and apparatus for verifying operation of notification appliances during low input voltage condition | Physics | 9 | Active |
| US7456585B2 | Optical element driving circuit | Electricity | 8 | Active |
| US7469204B2 | Method and apparatus for calculating voltage drop | Physics | 6 | Active |
| US7382245B2 | Method and apparatus for indicating a power condition at a notification appliance | Physics | 6 | Active |
| US7091855B2 | Fire alarm with distinct alarm reset threshold | Physics | 6 | Expired |
| US7145466B2 | National security warning system integrated with building fire alarm notification system | Physics | 6 | Expired |
| US7459881B2 | Method and apparatus for monitoring battery back-up power in an alarm system | Emerging Cross-Sectional Technologies | 5 | Active |
| US8373420B2 | Ground fault detection | Physics | 5 | Active |
| US8319625B2 | Fire alarm textual notification related application | Physics | 4 | Active |
| US8138928B2 | Multiple event notification appliance | Physics | 4 | Active |
| US8378806B2 | Pseudo non-addressable alarm system | Physics | 4 | Active |
| US7619534B2 | Method and apparatus for detection of hazardous or potentially hazardous conditions | Physics | 4 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.