OSD Envizion, Inc.
11Patents
0Active
11Granted
33Portfolio score
Filing activity: Feb 8, 1991 → Sep 4, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5208688A | Eye protection device for welding helmets | Physics | 164 | Expired |
| US5751258A | Liquid crystal lens driver electronics for eye protection, high speed shuttering with consistent performance | Physics | 116 | Expired |
| US5377032A | Electro-optic light shutter and frame assembly with integrated switching mechanism | Human Necessities | 68 | Expired |
| US5515186A | Eye protection device for welding helmets which reduces obliquely incident light | Physics | 65 | Expired |
| US5959705A | Welding lens with integrated display, switching mechanism and method | Performing Operations; Transporting | 50 | Expired |
| US5248880A | Detector system for detecting the occurrence of welding | Physics | 47 | Expired |
| US6067129A | Welding lens with integrated display and method | Performing Operations; Transporting | 42 | Expired |
| US5252817A | Detector system for detecting the occurrence of welding using detector feedback | Physics | 39 | Expired |
| US5347383A | High speed, low power driving circuit for liquid crystal shutter | Physics | 23 | Expired |
| USD349588S | Welding lens assembly | General | 14 | Expired |
| USD353692S | Welding lens assembly | General | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.