Optrel Holding AG
29Patents
15Active
29Granted
44Portfolio score
Filing activity: Apr 14, 1988 → Dec 18, 2020 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5571217A | Protective assembly for the protection of the human head | Human Necessities | 67 | Expired |
| US4863244A | Electro-optic welding lens assembly | Human Necessities | 66 | Expired |
| USD365666S | Welding helmet | General | 44 | Expired |
| US6675800B2 | Emergency flight safety device | Performing Operations; Transporting | 35 | Expired |
| US6270223A | Active electro-optical filter device and glare-protection device | Human Necessities | 31 | Expired |
| USD310276S | Welding mask | General | 25 | Expired |
| US5793449A | Protective device | Human Necessities | 23 | Expired |
| US5510609A | Electrically controllable optical filter element | Emerging Cross-Sectional Technologies | 14 | Expired |
| US7161116B2 | Welding protective mask with illumination equipment | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US6941577B2 | Antiglare device for welding protective masks | Human Necessities | 7 | Expired |
| USD316164S | Holder for face visor, hearing protector and similar equipment | General | 7 | Expired |
| US6796652B1 | Glare-protection device with a screened evaluation circuit | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6891681B2 | Anti-glare protection device | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US9610198B2 | Protection device for a welder | Physics | 5 | Active |
| US6887531B2 | Glare protection device | Chemistry; Metallurgy | 3 | Expired |
| US10736782B2 | Face protector | Human Necessities | 2 | Active |
| USRE45677E1 | Anti-glare protection device | General | 1 | Active |
| US10274753B2 | Sun protection device | Physics | 1 | Active |
| US10251786B2 | Method and apparatus for controlling opening of an auto-darkening filter in an eye protection device | Human Necessities | 1 | Active |
| US8181270B2 | Anti-glare protection device | Physics | 1 | Active |
| US11061262B2 | Protective cartridge and method with a protective cartridge | Human Necessities | 1 | Active |
| US7800034B2 | Dazzle protection unit for a portable dazzle protection device including a light capturing element guiding light to at least one sensor | Human Necessities | 1 | Active |
| US12017097B2 | Blower device for a respiratory protection system | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US10401651B2 | Protection device | Human Necessities | 0 | Active |
| US10098788B2 | Electro-optical glare-protection filter with a liquid crystal cell being a fringe-field switching cell for a welder protection device | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.