OPTEX CO., LTD.
156Patents
59Active
156Granted
48Portfolio score
Filing activity: Dec 13, 1988 → Oct 10, 2023 · 14 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5689235A | Electronic security system | Physics | 216 | Expired |
| US6469625B1 | Security sensor having disturbance detecting capability | Physics | 84 | Expired |
| US6970085B2 | Door sensor and door equipped with such door sensor | Fixed Constructions | 55 | Expired |
| US5703368A | Passive-type infrared sensor system for detecting human body | Emerging Cross-Sectional Technologies | 53 | Expired |
| US6756910B2 | Sensor for automatic doors | Fixed Constructions | 51 | Expired |
| USD421229S | Laser distance meter | General | 42 | Expired |
| US5461231A | Passive type moving object detection system | Emerging Cross-Sectional Technologies | 42 | Expired |
| US6791087B1 | Differential infrared detector | Physics | 35 | Expired |
| USD417165S | Infrared rays sensor | General | 32 | Expired |
| US5996281A | Safety auxiliary apparatus for automatic door assembly | Fixed Constructions | 31 | Expired |
| US5113387A | Three laser optical disk drive system | Physics | 29 | Expired |
| USD795108S1 | Human body detector | General | 29 | Active |
| US6782660B2 | Automatic door sensor | Fixed Constructions | 28 | Expired |
| US5537382A | Partial response coding for a multi-level optical recording channel | Physics | 27 | Expired |
| US4849635A | Intruder perceiving apparatus by means of infrared detection | Emerging Cross-Sectional Technologies | 26 | Expired |
| USD415442S | Intruder detection sensor | General | 23 | Expired |
| US7259658B2 | Passive infrared sensor and obstacle detection system used in the same | Physics | 21 | Expired |
| US6919567B2 | Active infrared sensor | Physics | 21 | Expired |
| USD696224S1 | Wireless video intercom | General | 20 | Active |
| USD537746S1 | Human body detector | General | 19 | Expired |
| US6943685B2 | Intrusion detecting device | Physics | 16 | Expired |
| US6529129B1 | Security sensor having disturbance detecting capability | Physics | 16 | Expired |
| US6992577B2 | Combined sensor | Physics | 15 | Expired |
| USD680013S1 | Human body detector | General | 15 | Active |
| USD525160S1 | Controller for television surveillance system | General | 15 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.