Exfo Electro-Optical Engineering, Inc.
19Patents
1Active
19Granted
34Portfolio score
Filing activity: Jan 21, 1992 → Jan 12, 2007 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5754284A | Optical time domain reflectometer with internal reference reflector | Physics | 79 | Expired |
| US6724469B2 | Polarization-OTDR for measuring characteristics of optical fibers | Physics | 35 | Expired |
| US6612750B1 | Adapter for interconnecting optical fiber connectors | Physics | 34 | Expired |
| US7187861B2 | Method and apparatus for testing optical networks | Electricity | 24 | Expired |
| US6204924A | Method and apparatus for measuring polarization mode dispersion of optical devices | Physics | 23 | Expired |
| US5305078A | Measurement of attenuation of optical fibers using transmitted wavelength and power information | Physics | 19 | Expired |
| US6636306B2 | Optical spectrum analyzer | Physics | 17 | Expired |
| US7227645B2 | Method and apparatus for measuring polarization mode dispersion | Physics | 11 | Expired |
| US7167655B2 | Measurement system for wide dynamic range optical power meter | Electricity | 10 | Expired |
| US6856398B2 | Method of and apparatus for making wavelength-resolved polarimetric measurements | Physics | 9 | Expired |
| US6762829B2 | Measurement of optical properties of passive optical devices using the matrix method | Physics | 6 | Expired |
| US6621067B2 | Polarization independent photodetector device and method of making same | Electricity | 6 | Expired |
| US6429929B2 | Method and apparatus for measuring phase differences between intensity-modulated optical signals | Physics | 5 | Expired |
| US7583727B2 | Single ended DMT test method for determining ADSL capability of cables | Electricity | 5 | Expired |
| US7116848B2 | Optical spectrum analyzer using a diffraction grating and multi-pass optics | Physics | 4 | Expired |
| US6819429B2 | Multi-pass optical spectrum analyzer having a polarization-dependent tunable filter | Physics | 3 | Expired |
| US6992828B2 | Optical attentuator system | Physics | 3 | Expired |
| US7382810B2 | Widely-tunable laser apparatus | Electricity | 1 | Active |
| US6930776B2 | High optical rejection optical spectrum analyzer/monochromator | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.