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Robert Graham Walker
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Northampton, GB
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Patents Grants
last 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 Applications
last 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