SECOM CO., LTD.
18Patents
1Active
18Granted
35Portfolio score
Filing activity: Oct 17, 1980 → Jun 28, 2013
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4559526A | Security alarm system | Physics | 239 | Expired |
| US4382291A | Surveillance system in which a reflected signal pattern is compared to a reference pattern | Physics | 79 | Expired |
| US5864290A | Magnetic alarm tag releasing device for a theft monitoring device | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4459213A | Fire-extinguisher composition | Human Necessities | 41 | Expired |
| US6094135A | Antitheft system and antitheft apparatus | Physics | 19 | Expired |
| US4499564A | Pattern comparison ultrasonic surveillance system with noise suppression | Physics | 19 | Expired |
| US5253293A | Adaptive data ciphering/deciphering apparatuses and data communication system using these apparatuses | Electricity | 18 | Expired |
| US5548815A | Inductive radio communication system | Electricity | 17 | Expired |
| US6452980B1 | Encoding/decoding system for coherent signal interference reduction | Electricity | 10 | Expired |
| US4567472A | Security-ensuring apparatus having an operational guidance function | Physics | 8 | Expired |
| US4953228A | Apparatus for detecting pattern of crest line | Human Necessities | 7 | Expired |
| US4609048A | Apparatus for automatically extinguishing fire | Human Necessities | 7 | Expired |
| US4536751A | System for detecting an alarm | Physics | 4 | Expired |
| US5101112A | Method of and apparatus for measuring a velocity vector by use of a spatial filter | Physics | 3 | Expired |
| US4536750A | Car-directing apparatus for an alarm system | Physics | 2 | Expired |
| US9177203B2 | Target detection device and target detection method | Physics | 2 | Active |
| US4536749A | Security-ensuring apparatus having an operational guidance function | Physics | 1 | Expired |
| US4514721A | Multi-operation mode type of security-ensuring apparatus | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.