Chorum Technologies LP
42Patents
0Active
42Granted
37Portfolio score
Filing activity: Oct 29, 1996 → Aug 3, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5867291A | Programmable wavelength router | Electricity | 103 | Expired |
| US5963291A | Optical attenuator using polarization modulation and a feedback controller | Physics | 90 | Expired |
| US5912748A | Switchable wavelength router | Electricity | 81 | Expired |
| US6519060B1 | Synchronous optical network in frequency domain | Electricity | 53 | Expired |
| US6208444A | Apparatus for wavelength demultiplexing using a multi-cavity etalon | Electricity | 52 | Expired |
| US5978116A | Programmable wavelength router | Electricity | 51 | Expired |
| US6175432A | Multi-wavelength cross-connect optical network | Electricity | 50 | Expired |
| US6166838A | Optical add/drop wavelength switch | Electricity | 49 | Expired |
| US6208442A | Programmable optical multiplexer | Electricity | 41 | Expired |
| US6097518A | N x M optical wavelength routing switch | Electricity | 36 | Expired |
| USRE37044E | Tunable add/drop optical filter | General | 35 | Expired |
| US6163393A | Method and apparatus for wavelength multipexing/demultiplexing | Electricity | 30 | Expired |
| US6243200A | Optical wavelength router based on polarization interferometer | Emerging Cross-Sectional Technologies | 28 | Expired |
| US6118912A | Apparatus for holding and tuning a thin-film optical assembly | Physics | 27 | Expired |
| US6134358A | N x N switch array with reduced components | Electricity | 25 | Expired |
| US6498680B1 | Compact tunable optical wavelength interleaver | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6141076A | Spatial light modulators constructed from ferroelectric liquid crystal devices with twisted structure | Physics | 21 | Expired |
| US6429962B1 | Dynamic gain equalizer for optical amplifiers | Electricity | 21 | Expired |
| US6094246A | Acute twist nematic liquid crystal electro-optic modulator for use in an infrared optical communication system having extinction ratio of -25db | Physics | 20 | Expired |
| US6201593A | Optical communication system having a liquid crystal routing switch | Physics | 20 | Expired |
| US6285478A | Programmable optical add/drop device | Electricity | 19 | Expired |
| US6137606A | Optical wavelength router | Electricity | 18 | Expired |
| US6600582B1 | Optical add/drop wavelength switch | Electricity | 18 | Expired |
| US6275312A | Optical routing switch | Electricity | 16 | Expired |
| US6545783B1 | Optical wavelength add/drop multiplexer | Electricity | 16 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.