Detection Systems, Inc.
🏢 View company profile →65Patents
0Active
65Granted
36Portfolio score
Filing activity: Mar 14, 1975 → Apr 6, 2000
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5578989A | Personal security system with system wide testing | Physics | 226 | Expired |
| US5943394A | Event detection system with dialer intercept | Electricity | 223 | Expired |
| US5083106A | Intruder detection system with programmable countdown timer for self-supervision | Physics | 207 | Expired |
| US5604493A | Security system transmitter with opposed concave actuators | Electricity | 205 | Expired |
| US5717378A | Security system with fall back to local control | Physics | 203 | Expired |
| US5774051A | Security system with multi-function transmitter | Physics | 202 | Expired |
| US5115224A | Personal security system network | Physics | 82 | Expired |
| US5572192A | Personal security system with guard tour features | Physics | 69 | Expired |
| US6163257A | Security system having event detectors and keypads with integral monitor | Physics | 65 | Expired |
| US5467074A | Personal security system with transmitter test mode | Physics | 65 | Expired |
| US4660024A | Dual technology intruder detection system | Physics | 63 | Expired |
| US5523740A | Wearable transmitter assembly | Physics | 63 | Expired |
| US5650766A | Wearable transmitter with optical tamper detection | Emerging Cross-Sectional Technologies | 61 | Expired |
| US5077548A | "Dual technology intruder detection system with sensitivity adjustment after ""default""" | Physics | 48 | Expired |
| USD339079S | Passive infrared intruder detection housing | General | 47 | Expired |
| US6268797A | Integrated portable tracking signal and access authorization signal generator | Physics | 44 | Expired |
| US4764755A | Intruder detection system with false-alarm-minimizing circuitry | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5400014A | Smoke detector with dark chamber | Physics | 39 | Expired |
| US4442359A | Multiple field-of-view optical system | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5705988A | Photoelectric smoke detector with count based A/D and D/A converter | Physics | 37 | Expired |
| US4225786A | Infrared detection system | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5552765A | Smoke detector with individually stored range of acceptable sensitivity | Physics | 31 | Expired |
| US5268668A | Security/fire alarm system with group-addressing remote sensors | Physics | 29 | Expired |
| US5233640A | Security system with backup dialer | Electricity | 27 | Expired |
| US5543777A | Smoke detector with individual sensitivity calibration and monitoring | Physics | 26 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.