NAPCO Security Systems, Inc.
35Patents
1Active
35Granted
36Portfolio score
Filing activity: Oct 1, 1975 → Aug 17, 2006 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6225903A | Alarm system armed and disarmed by a deadbolt on a door | Fixed Constructions | 73 | Expired |
| US4191948A | Digital transmission apparatus particularly adapted for security systems | Physics | 64 | Expired |
| US4833450A | Fault detection in combination intrusion detection systems | Physics | 52 | Expired |
| US5331308A | Automatically adjustable and self-testing dual technology intrusion detection system for minimizing false alarms | Physics | 39 | Expired |
| USD310791S | Keyboard and display panel for an intrusion detection system | General | 39 | Expired |
| US4742183A | Methods and techniques for fabricating foldable printed circuit boards | Electricity | 39 | Expired |
| US4137429A | Digital dialers for use in the security field | Electricity | 34 | Expired |
| US4622541A | Intrusion detection system | Physics | 30 | Expired |
| US5684458A | Microwave sensor with adjustable sampling frequency based on environmental conditions | Physics | 30 | Expired |
| US6812836B2 | Alarm system armed and disarmed by a door contact | Emerging Cross-Sectional Technologies | 23 | Expired |
| US7449999B2 | Security system interface module | Electricity | 22 | Active |
| US4003045A | Intrusion detection systems with turbulence discrimination | Physics | 20 | Expired |
| US6198389A | Integrated individual sensor control in a security system | Physics | 20 | Expired |
| US4498075A | Fault indicator apparatus for a multi-zone intrusion system | Physics | 20 | Expired |
| USD326619S | Keypad for a security system | General | 19 | Expired |
| USD251485S | Pulse code transmitter or similar article | General | 17 | Expired |
| US4100543A | Audible alarm apparatus particularly adaptable for use with fire and theft security systems | Physics | 16 | Expired |
| US6177925A | Customized overlay template for alarm control panel keypad | Physics | 15 | Expired |
| US4074248A | Dual operating control circuits for intrusion detection systems | Physics | 14 | Expired |
| US4145581A | Automatic telephone dialer for use in intrusion detection systems | Electricity | 14 | Expired |
| US6591474B2 | Apparatus and method of installing an alarm sensor to a corner wall | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4064509A | Intrusion detection systems employing automatic sensitivity adjustments | Physics | 13 | Expired |
| USD337513S | Bracket for a siren module | General | 12 | Expired |
| US5008840A | Multi-zone microprocessor fire control apparatus | Physics | 10 | Expired |
| USD302952S | Microwave and passive infrared intrusion detector | General | 10 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.