Robert Graham Walker

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Northampton, GB

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Patents Grantslast 30 patents

Information Patent Grant
Polarization rotators
- Patent number 7,204,932
- Issue date Apr 17, 2007
- Bookham Technology PLC
- Robert Ian Johnstone
- G02 - OPTICS
Information Patent Grant
Semiconductor optical device
- Patent number 7,184,207
- Issue date Feb 27, 2007
- Bookham Technology plc
- Robert Graham Walker
- G02 - OPTICS
Information Patent Grant
Guided wave spatial filter
- Patent number 7,174,080
- Issue date Feb 6, 2007
- Bookham Technology, plc
- Robert Graham Walker
- G02 - OPTICS
Information Patent Grant
Optical modulators operated in parallel push-pull mode
- Patent number 7,082,237
- Issue date Jul 25, 2006
- Bookham Technology, PLC
- Robert Graham Walker
- G02 - OPTICS
Information Patent Grant
Photonic integrated device
- Patent number 7,035,486
- Issue date Apr 25, 2006
- Bookham Technology, PLC
- Robert Griffin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Integrated optical device with zero-gap and well-spaced regions
- Patent number 5,082,341
- Issue date Jan 21, 1992
- Gec-Marconi Limited
- Robert G. Walker
- G02 - OPTICS
Information Patent Grant
Guided-wave optical wavelength duplexer
- Patent number 4,979,790
- Issue date Dec 25, 1990
- Plessey Overseas Limited
- Robert G. Walker
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Optical modulator with pre-determined frequency chirp
- Publication number 20060120655
- Publication date Jun 8, 2006
- Bookham Technology PLC.
- Robert Graham Walker
- G02 - OPTICS
Information Patent Application
Optical modulator
- Publication number 20050147351
- Publication date Jul 7, 2005
- BOOKHAM TECHNOLOGY, PLC
- Robert Ian Johnstone
- G02 - OPTICS
Information Patent Application
Optical modulators operated in parallel push-pull mode
- Publication number 20050123242
- Publication date Jun 9, 2005
- BOOKHAM TECHNOLOGY, plc
- Robert Graham Walker
- G02 - OPTICS
Information Patent Application
Polarisation rotators
- Publication number 20050095741
- Publication date May 5, 2005
- Robert Ian Johnstone
- G02 - OPTICS
Information Patent Application
Photonic integrated device
- Publication number 20050069240
- Publication date Mar 31, 2005
- Robert Griffin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Guided wave spatial filter
- Publication number 20040131310
- Publication date Jul 8, 2004
- Robert Graham Walker
- G02 - OPTICS
Information Patent Application
Optical modulator with pre-determined frequency chirp
- Publication number 20030190107
- Publication date Oct 9, 2003
- Robert Graham Walker
- G02 - OPTICS