Digital Security Controls Ltd.
39Patents
0Active
39Granted
36Portfolio score
Filing activity: Nov 16, 1990 → Jun 26, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5625338A | Wireless alarm system | Physics | 272 | Expired |
| US6388564B1 | Power distribution grid communication system | Electricity | 172 | Expired |
| US6366211B1 | Remote recovery arrangement for alarm system | Physics | 136 | Expired |
| US6215405A | Programmable temperature sensor for security system | Physics | 132 | Expired |
| US6157292A | Power distribution grid communication system | Electricity | 125 | Expired |
| US5719557A | Photoelectric smoke detector | Physics | 62 | Expired |
| US5276427A | Auto-adjust motion detection system | Physics | 58 | Expired |
| US6756905B2 | Photoelectric smoke detector and chamber therefor | Physics | 47 | Expired |
| USD461047S1 | Key fob | General | 42 | Expired |
| US6175307A | Security system with audible link and two-way communication | Physics | 42 | Expired |
| US5517518A | Method and arrangement for recognition of a coded transmitted signal | Electricity | 35 | Expired |
| US6838988B2 | Smoke detector with performance reporting | Physics | 35 | Expired |
| US5923250A | Size discriminating dual element PIR detector | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5920270A | Security system remote control | Physics | 27 | Expired |
| US5523743A | Self-diagnostic smoke detector | Physics | 25 | Expired |
| US5917410A | Glass break sensor | Physics | 24 | Expired |
| US5504473A | Method of analyzing signal quality | Physics | 22 | Expired |
| US5453733A | Intrusion alarm with independent trouble evaluation | Physics | 21 | Expired |
| USD357638S | Keypad for a security system | General | 18 | Expired |
| US5216410A | Intrusion alarm sensing unit | Physics | 18 | Expired |
| US6351234B1 | Combination microwave passive infrared motion detector with anti-masking evaluation | Physics | 17 | Expired |
| US5594428A | Combination security unit | Physics | 16 | Expired |
| US6265972A | Pet resistant pir detector | Physics | 15 | Expired |
| US5898368A | Test indicator control circuit for security alarm device | Physics | 14 | Expired |
| US6161958A | Self diagnostic heat detector | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.