Tycom (US) Inc.
46Patents
0Active
46Granted
38Portfolio score
Filing activity: Jun 26, 1997 → Jan 22, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6496629B2 | Undersea telecommunications cable | Physics | 125 | Expired |
| US6341023B1 | Multiple level modulation in a wavelength-division multiplexing (WDM) systems | Electricity | 67 | Expired |
| US6320884A | Wide bandwidth Raman amplifier employing a pump unit generating a plurality of wavelengths | Electricity | 60 | Expired |
| US6181464A | Low noise Raman amplifier employing bidirectional pumping and an optical transmission system incorporating same | Electricity | 55 | Expired |
| US6414786B1 | Method and apparatus for reducing polarization dependent gain in Raman amplification | Electricity | 32 | Expired |
| US6307667A | Gain-clamped erbium-doped fiber amplifier with pulsed compensating laser signal | Electricity | 25 | Expired |
| US6381394B1 | Method and apparatus for assembling an amplifier assembly | Physics | 25 | Expired |
| US6259543A | Efficient method for assessing the system performance of an optical transmission system while accounting for penalties arising from nonlinear interactions | Electricity | 25 | Expired |
| US6323981A | Method and apparatus for detecting intermittent faults in an optical communication system | Electricity | 24 | Expired |
| US6269515A | Apparatus for cleaning an optical fiber splicer electrode | Human Necessities | 22 | Expired |
| US6349161B1 | Undersea communications cable having centrally located, plastic buffer tube | Physics | 21 | Expired |
| US6424455B1 | Wide bandwidth fiber raman amplifier | Electricity | 21 | Expired |
| US6414775B1 | Method and apparatus for measuring gain shape in an optical repeater using FM modulation | Electricity | 17 | Expired |
| US6327250A | Method and apparatus for supressing crosstalk between data and monitoring channel in an optical communication system | Electricity | 16 | Expired |
| US6366381B1 | Remote monitoring of an optical transmission system using line monitoring signals | Electricity | 14 | Expired |
| US6311002A | Method and apparatus for reducing nonlinear penalties by proper arrangement of the dispersion map in an optical communication system | Electricity | 13 | Expired |
| US6342961B1 | Method and apparatus for improving spectral efficiency in wavelength division multiplexed transmission systems | Electricity | 12 | Expired |
| US6317238A | Chromatic dispersion management for optical wavelength division multiplexed transmission systems | Physics | 12 | Expired |
| US6396624B1 | Extended band erbium doped fiber amplifier | Electricity | 11 | Expired |
| US6289724A | Method and apparatus for examining internal components of a sealed container | Physics | 11 | Expired |
| US6527476B1 | Non-sinking manhole assembly for below ground liquid storage tanks | Performing Operations; Transporting | 11 | Expired |
| US6295901A | Method and apparatus for coupling a fiber optic connector | Electricity | 10 | Expired |
| US6481903B1 | Optical fiber splice protector and method for applying same | Physics | 10 | Expired |
| US6404527B1 | Method and apparatus for transmitting a response signal from an optical repeater to a terminal requesting status information | Electricity | 10 | Expired |
| US6424761B1 | Cable repeater connecting joint | Physics | 9 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.