OptoTech AG
12Patents
3Active
12Granted
39Portfolio score
Filing activity: Nov 13, 1985 → Oct 30, 2020 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4791623A | File management system for use in an optical data storage system | Physics | 45 | Expired |
| US4736356A | Optical disk drive | Physics | 43 | Expired |
| US7135016B1 | Non-penetrating filtration surgery | Human Necessities | 42 | Expired |
| US8419224B2 | Light-emitting diode streetlight structure | Mechanical Engineering; Lighting; Heating | 41 | Active |
| US4700056A | Objective lens focus initialization system | Physics | 27 | Expired |
| USD648473S1 | LED street lamp | General | 22 | Expired |
| US4719610A | Objective lens velocity control system for use in an optical data storage system | Physics | 21 | Expired |
| US4680594A | Single beam direct read during write and write protect system for use in an optical data storage system | Physics | 18 | Expired |
| USD296102S | Optical disk drive front panel | General | 9 | Expired |
| US4843603A | Concentric photodetector arrangement for focusing and tracking | Physics | 6 | Expired |
| US8523400B2 | Light-emitting diode streetlight structure | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US11535412B2 | Method for unpacking a workpiece, unpacking apparatus and a processing apparatus having an unpacking apparatus of this kind | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.