Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6480658 | Optical fiber transmission line for wavelength division multiplexing transmission system | Takao Naito, Masuo Suyama, Jose Chesnoy | 2002-11-12 |
| 6130765 | Drop/insert apparatus for dropping/inserting channels on a bidirectional multi-channel optical link | Vincent Letellier | 2000-10-10 |
| 6122044 | Process for locating by reflectometry a fault on an optical transmission link and location device applying such process | Vincent Letellier | 2000-09-19 |
| 6025948 | Optical signal transmission installation including a repeater monitoring system | — | 2000-02-15 |
| 6008922 | Optical communication system using optical amplifiers with gain dependent on input signal polarization | Vincent Letellier | 1999-12-28 |
| 5491577 | Tunable optical filter tuning device suitable for use in the receive part of an optical transmission system | Christian Coeurjolly | 1996-02-13 |
| 5408350 | Bidirectional transmission system, especially one using optical fiber, employing a single carrier for both transmission directions | Philippe Perrier | 1995-04-18 |