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Reel/Frame:	020582/0143			Pages:	17
		Recorded:	02/29/2008
Attorney Dkt #:	16577-009001
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Total properties: 111
Page 1 of 2
Pages: 1 2

Patent #:	5004314	Issue Dt:	04/02/1991	Application #:	07209622	Filing Dt:	06/24/1988
Title:	OPTICAL SIGNAL MODULATION DEVICE

Patent #:	5018831	Issue Dt:	05/28/1991	Application #:	07216717	Filing Dt:	07/06/1988
Title:	OPTICAL RESONANT DEVICE

Patent #:	4964134	Issue Dt:	10/16/1990	Application #:	07254934	Filing Dt:	10/04/1988
Title:	SEMICONDUCTOR LASER STRUCTURES

Patent #:	5024500	Issue Dt:	06/18/1991	Application #:	07282337	Filing Dt:	12/02/1988
Title:	CANTILEVER BEAM RADIATION DEFLECTOR ASSEMBLY

Patent #:	4995100	Issue Dt:	02/19/1991	Application #:	07318221	Filing Dt:	03/02/1989
Title:	AMPLIFICATION OF OPTICAL SIGNALS

Patent #:	4933299	Issue Dt:	06/12/1990	Application #:	07322124	Filing Dt:	03/13/1989
Title:	METHOD OF FORMING 3-D STRUCTURES USING MOCVD WITH IN-SITU PHOTOETCHING

Patent #:	4973122	Issue Dt:	11/27/1990	Application #:	07382634	Filing Dt:	08/02/1989
Title:	OPTICAL NONLINEAR CROSS-COUPLED INTERFEROMETER AND METHOD UTILIZING SAME

Patent #:	4952016	Issue Dt:	08/28/1990	Application #:	07382682	Filing Dt:	08/11/1989
Title:	OPTICAL POWER LIMITER

Patent #:	4981814	Issue Dt:	01/01/1991	Application #:	07393102	Filing Dt:	08/03/1989
Title:	PREPARATION OF SEMICONDUCTOR DEVICES

Patent #:	5058124	Issue Dt:	10/15/1991	Application #:	07424284	Filing Dt:	10/23/1989
Title:	SEMICONDUCTOR DEVICE AND PIEZOELECTRIC STACK OPTICAL MOUNTING ASSEMBLY

Patent #:	5058986	Issue Dt:	10/22/1991	Application #:	07447125	Filing Dt:	12/11/1989
Title:	NON-LINEAR INFERFEROMETER

Patent #:	5080459	Issue Dt:	01/14/1992	Application #:	07476385	Filing Dt:	05/31/1990
Title:	MOUNTING ASSEMBLY FOR OPTICAL EQUIPMENT

Patent #:	5015964	Issue Dt:	05/14/1991	Application #:	07494835	Filing Dt:	03/16/1990
Title:	OPTICAL AMPLIFIERS

Patent #:	5031236	Issue Dt:	07/09/1991	Application #:	07530421	Filing Dt:	05/31/1990
Title:	POLARISATION INSENSITIVE OPTICAL SIGNAL RECEPTION

Patent #:	5448059	Issue Dt:	09/05/1995	Application #:	07541973	Filing Dt:	06/22/1990
Title:	OPTICAL TIME DOMAIN RELECTOMETRY WITH OPTICAL AMPLIFIER FOR EXTENDED RANGE AND/OR SENSITIVITY

Patent #:	5115489	Issue Dt:	05/19/1992	Application #:	07548983	Filing Dt:	08/01/1990
Title:	SPLICE TRAY

Patent #:	5343055	Issue Dt:	08/30/1994	Application #:	07651228	Filing Dt:	02/06/1991
Title:	AVALANCHE PHOTODIODE STRUCTURE WITH MG DOPING AND METHOD

Patent #:	5202897	Issue Dt:	04/13/1993	Application #:	07704994	Filing Dt:	05/24/1991
Title:	FABRY-PEROT MODULATOR

Patent #:	5477366	Issue Dt:	12/19/1995	Application #:	07741525	Filing Dt:	10/01/1991
Title:	OPTICAL TRANSMISSION SYSTEM

Patent #:	5245458	Issue Dt:	09/14/1993	Application #:	07743335	Filing Dt:	08/26/1991
Title:	OPTICAL INTERCONNECT NETWORKS

Patent #:	5193027	Issue Dt:	03/09/1993	Application #:	07743404	Filing Dt:	08/14/1991
Title:	OPTICAL FILTER TUNING APPARATUS AND AN OPTICAL FILTERING METHOD

Patent #:	5142408	Issue Dt:	08/25/1992	Application #:	07750700	Filing Dt:	08/20/1991
Title:	OPTICAL AMPLIFIER

Patent #:	5241617	Issue Dt:	08/31/1993	Application #:	07761780	Filing Dt:	09/24/1991
Title:	OPTICAL FIBRE BACK PLANE

Patent #:	5279687	Issue Dt:	01/18/1994	Application #:	07761893	Filing Dt:	09/12/1991
Title:	PREPARING SUBSTRATES BY ANNEALING EPITAXIAL LAYERS IN THE FORM OF NESAS AND SUBSTRATES SO PREPARED

Patent #:	5153933	Issue Dt:	10/06/1992	Application #:	07761900	Filing Dt:	09/12/1991
Title:	APPARATUS FOR GENERATING A COMB OF OPTICAL TEETH OF DIFFERENT WAVELENGTHS

Patent #:	5253094	Issue Dt:	10/12/1993	Application #:	07762025	Filing Dt:	09/17/1991
Title:	OPTICAL INTERCONNECTION NETWORK

Patent #:	5216237	Issue Dt:	06/01/1993	Application #:	07762026	Filing Dt:	09/17/1991
Title:	OPTICAL DETECTOR WITH INTEGRAL FILTER AND HAVING FABRY PEROT RESONATOR SYSTEM

Patent #:	5242857	Issue Dt:	09/07/1993	Application #:	07824869	Filing Dt:	01/22/1992
Title:	METHOD OF MANUFACTURING SEMICONDUCTOR STRUCTURES

Patent #:	5208455	Issue Dt:	05/04/1993	Application #:	07842342	Filing Dt:	03/25/1992
Title:	SQUARE OPTICAL PULSE GENERATOR

Patent #:	5262000	Issue Dt:	11/16/1993	Application #:	07842346	Filing Dt:	03/20/1992
Title:	METHOD FOR MAKING MICROMECHANICAL SWITCH

Patent #:	5331452	Issue Dt:	07/19/1994	Application #:	07848983	Filing Dt:	04/20/1992
Title:	OPTICAL DETECTOR

Patent #:	5305403	Issue Dt:	04/19/1994	Application #:	07862757	Filing Dt:	06/24/1992
Title:	OPTICAL WAVEGUIDE AND METHOD OF MAKING AN OPTICAL WAVEGUIDE

Patent #:	RE34520	Issue Dt:	01/25/1994	Application #:	07936127	Filing Dt:	08/27/1992
Title:	OPTICAL POWER LIMITER

Patent #:	5343286	Issue Dt:	08/30/1994	Application #:	07938218	Filing Dt:	10/14/1992
Title:	OTDR HAVING OPTICALLY SWITCHED AMPLIFIED OUTPUT ONTO TEST FIBRE TO SUPPRESS OPTICAL AMPLIFIER NOISE BETWEEN OTDR PLUSES

Patent #:	5377288	Issue Dt:	12/27/1994	Application #:	07940960	Filing Dt:	11/03/1992
Title:	METHOD OF FORMING A REFRACTIVE INDEX GRATING IN AN OPTICAL WAVEGUIDE

Patent #:	5363386	Issue Dt:	11/08/1994	Application #:	07946464	Filing Dt:	11/18/1992
Title:	OPTICAL WAVEGUIDE LASER

Patent #:	5724149	Issue Dt:	03/03/1998	Application #:	07956008	Filing Dt:	12/03/1992
Title:	OPTICAL COMMUNICATION LINK FAULT SIGNALLING

Patent #:	5500764	Issue Dt:	03/19/1996	Application #:	07961710	Filing Dt:	01/12/1993
Title:	OPTICAL WAVEGUIDE AMPLIFIER

Patent #:	5323475	Issue Dt:	06/21/1994	Application #:	07969309	Filing Dt:	02/16/1993
Title:	OPTICAL CONNECTOR

Patent #:	5371820	Issue Dt:	12/06/1994	Application #:	07969320	Filing Dt:	02/18/1993
Title:	OPTICAL HYBRID MOTHERBOARD INTERCONNECTION SYSTEM AND METHOD OF ASSEMBLING SAME

Patent #:	5334232	Issue Dt:	08/02/1994	Application #:	07983854	Filing Dt:	03/04/1993
Title:	METHOD FOR THE PREPARATION OF HALIDE GLASS ARTICLES

Patent #:	5305133	Issue Dt:	04/19/1994	Application #:	08032195	Filing Dt:	03/15/1993
Title:	TWO-WAY OPTICAL COMMUNICATIONS SYSTEM

Patent #:	5504607	Issue Dt:	04/02/1996	Application #:	08037581	Filing Dt:	03/26/1993
Title:	OPTICAL INTERCONNECTION NETWORK

Patent #:	5483340	Issue Dt:	01/09/1996	Application #:	08039081	Filing Dt:	03/30/1993
Title:	SAGNAC LOOP INTERFEROMETER

Patent #:	5416864	Issue Dt:	05/16/1995	Application #:	08050163	Filing Dt:	04/30/1993
Title:	OPTICAL FIBER AMPLIFIED TAPPING NETWORK AND METHOD USING SAME

Patent #:	5383197	Issue Dt:	01/17/1995	Application #:	08050165	Filing Dt:	04/30/1993
Title:	LASER AND AN AMPLIFIER

Patent #:	5384884	Issue Dt:	01/24/1995	Application #:	08050194	Filing Dt:	05/04/1993
Title:	METHOD OF FORMING OPTICAL FIBRE GRATINGS

Patent #:	5342478	Issue Dt:	08/30/1994	Application #:	08050212	Filing Dt:	05/06/1993
Title:	SELF-ALIGNED V-GROOVES AND WAVEGUIDES

Patent #:	5465312	Issue Dt:	11/07/1995	Application #:	08050358	Filing Dt:	08/10/1993
Title:	INTREGRATED OPTICAL FIBRE AND SUBSTRATE SUPPORTED OPTICAL WAVEGUIDE HAVING DIRECTLY CONNECTED OPTICAL CORES

Patent #:	5390285	Issue Dt:	02/14/1995	Application #:	08050399	Filing Dt:	05/10/1993
Title:	METHOD AND APPARATUS FOR TRAINING A NEURAL NETWORK DEPENDING ON AVERAGE MISMATCH

Patent #:	5406410	Issue Dt:	04/11/1995	Application #:	08054969	Filing Dt:	05/03/1993
Title:	OPTICAL FIBRE AMPLIFIER AND LASER

Patent #:	5369523	Issue Dt:	11/29/1994	Application #:	08059412	Filing Dt:	05/11/1993
Title:	OPTICAL AMPLIFIER AND LASER

Patent #:	5461497	Issue Dt:	10/24/1995	Application #:	08119127	Filing Dt:	09/20/1993
Title:	PHOTONIC AMPLIFIER

Patent #:	5479291	Issue Dt:	12/26/1995	Application #:	08199299	Filing Dt:	04/08/1994
Title:	NON-LINEAR OPTICAL INTERFEROMETER WITH SATURATED AMPLIFIER

Patent #:	5533154	Issue Dt:	07/02/1996	Application #:	08211792	Filing Dt:	07/13/1994
Title:	OPTICAL MEMORY

Patent #:	5504617	Issue Dt:	04/02/1996	Application #:	08230370	Filing Dt:	04/20/1994
Title:	OPTICAL TIME DOMAIN REFLECTOMETRY

Patent #:	5422897	Issue Dt:	06/06/1995	Application #:	08241895	Filing Dt:	05/13/1994
Title:	TWO-STAGE MONO-MODE OPTICAL FIBRE LASER

Patent #:	5666224	Issue Dt:	09/09/1997	Application #:	08244873	Filing Dt:	06/15/1994
Title:	OPTICAL GRATING AND METHOD OF FABRICATING AN OPTICAL GRATING

Patent #:	5656507	Issue Dt:	08/12/1997	Application #:	08256939	Filing Dt:	10/04/1994
Title:	A PROCESS FOR SELF-ALIGNING CICUIT COMPONETS BROUGHT INTO ABUTMENT BY SURFACE TENSION OF A MOLTEN MATERIAL AND BONDING UNDER TENSION

Patent #:	5445767	Issue Dt:	08/29/1995	Application #:	08273616	Filing Dt:	07/12/1994
Title:	OPTICAL SWITCHES

Patent #:	5726783	Issue Dt:	03/10/1998	Application #:	08284045	Filing Dt:	08/01/1994
Title:	OPTICAL FIBRE COMMUNICATION SYSTEM

Patent #:	6185025	Issue Dt:	02/06/2001	Application #:	08300524	Filing Dt:	09/06/1994
Title:	METHOD AND APPARATUS FOR TRANSMITTING INFORMATION

Patent #:	6075625	Issue Dt:	06/13/2000	Application #:	08302931	Filing Dt:	09/22/1994
Title:	PHOTOINDUCED GRATING IN B2O3 CONTAINING GLASS

Patent #:	5453873	Issue Dt:	09/26/1995	Application #:	08309136	Filing Dt:	09/20/1994
Title:	OPTICAL AMPLIFIER AND LASER

Patent #:	5583689	Issue Dt:	12/10/1996	Application #:	08347298	Filing Dt:	02/08/1995
Title:	FILTER WITH PRESELECTED ATTENUATION/WAVELENGTH CHARACTERISTIC

Patent #:	5757523	Issue Dt:	05/26/1998	Application #:	08379450	Filing Dt:	03/02/1995
Title:	OPTICAL RADIATION DEVICES

Patent #:	5590142	Issue Dt:	12/31/1996	Application #:	08403717	Filing Dt:	03/14/1995
Title:	MODE-LOCKED FIBRE RING LASER STABILISATION

Patent #:	5618326	Issue Dt:	04/08/1997	Application #:	08408193	Filing Dt:	03/22/1995
Title:	SURFACE TREATMENT OF HALIDE GLASS ARTICLES

Patent #:	5560868	Issue Dt:	10/01/1996	Application #:	08436455	Filing Dt:	05/22/1995
Title:	HALIDE GLASS COMPOSITIONS AND OPTICAL CIRCUITS AND METHODS EMPLOYING SAME

Patent #:	5533156	Issue Dt:	07/02/1996	Application #:	08440460	Filing Dt:	05/12/1995
Title:	INTEGRATED OPTICAL FIBRE AND SUBSTRATE SUPPORTED OPTICAL WAVEGUIDE HAVING DIRECTLY CONNECTED OPTICAL CORES

Patent #:	5867515	Issue Dt:	02/02/1999	Application #:	08507374	Filing Dt:	10/05/1995
Title:	HALIDE GLASS COMPOSITIONS

Patent #:	5617244	Issue Dt:	04/01/1997	Application #:	08513944	Filing Dt:	09/08/1995
Title:	OPTICAL AMPLIFIER AND LASER

Patent #:	5684615	Issue Dt:	11/04/1997	Application #:	08513972	Filing Dt:	09/07/1995
Title:	OPTICAL SYSTEM

Patent #:	5861970	Issue Dt:	01/19/1999	Application #:	08586634	Filing Dt:	01/29/1996
Title:	DISPERSION COMPENSATION IN AN OPTICAL COMMUNICATIONS SYSTEM

Patent #:	5583957	Issue Dt:	12/10/1996	Application #:	08588298	Filing Dt:	01/18/1996
Title:	OPTICAL SWITCH

Patent #:	5838025	Issue Dt:	11/17/1998	Application #:	08591476	Filing Dt:	01/29/1996
Title:	ELECTRICAL BARRIER STRUCTURE FOR SEMICONDUCTOR DEVICE DOPED WITH CHROMIUM AND/OR TITANIUM

Patent #:	5796891	Issue Dt:	08/18/1998	Application #:	08646256	Filing Dt:	05/30/1996
Title:	OPTICAL FILTER COMPRISING MULTI-MODE WAVEGUIDES COUPLED IN SERIES

Patent #:	5778015	Issue Dt:	07/07/1998	Application #:	08648611	Filing Dt:	05/16/1996
Title:	OPTICAL PULSE SOURCE

Patent #:	5774484	Issue Dt:	06/30/1998	Application #:	08688003	Filing Dt:	07/29/1996
Title:	TWO STAGE MONO-MODE OPTICAL FIBER LASER

Patent #:	5844929	Issue Dt:	12/01/1998	Application #:	08700925	Filing Dt:	08/23/1996
Title:	OPTICAL DEVICE WITH COMPOSITE PASSIVE AND TAPERED ACTIVE WAVEGUIDE REGIONS

Patent #:	5772915	Issue Dt:	06/30/1998	Application #:	08702464	Filing Dt:	03/20/1997
Title:	GLASS COMPOSITIONS

Patent #:	5852696	Issue Dt:	12/22/1998	Application #:	08765644	Filing Dt:	01/14/1997
Title:	PACKAGED OPTICAL DEVICE

Patent #:	5784395	Issue Dt:	07/21/1998	Application #:	08776790	Filing Dt:	02/11/1997
Title:	DARK PULSE GENERATION

Patent #:	6172811	Issue Dt:	01/09/2001	Application #:	08780681	Filing Dt:	01/08/1997
Title:	OPTICAL GRATING AND A METHOD OF FABRICATING AN OPTICAL GRATING

Patent #:	5917972	Issue Dt:	06/29/1999	Application #:	08809130	Filing Dt:	03/24/1997
Title:	OPTICAL DEVICE

Patent #:	5881200	Issue Dt:	03/09/1999	Application #:	08809179	Filing Dt:	03/20/1997
Title:	OPTICAL FIBRE WITH QUANTUM DOTS

Patent #:	6036769	Issue Dt:	03/14/2000	Application #:	08816742	Filing Dt:	12/30/1996
Title:	PREPARATION OF SEMICONDUCTOR SUBSTRATES

Patent #:	6041069	Issue Dt:	03/21/2000	Application #:	08877997	Filing Dt:	06/18/1997
Title:	A LASER DEVICE TUNED BY FORMING A REFRACTIVE INDEX GRATING IN OPTICAL FIBER

Patent #:	5978400	Issue Dt:	11/02/1999	Application #:	08913002	Filing Dt:	12/17/1997
Title:	LASER

Patent #:	6381056	Issue Dt:	04/30/2002	Application #:	08913708	Filing Dt:	09/22/1997
Title:	DARK PULSE GENERATION AND TRANSMISSION

Patent #:	6223562	Issue Dt:	05/01/2001	Application #:	08960129	Filing Dt:	10/17/1996
Title:	ETCHING A HALIDE GLASS TUBE, REMOVING THE ETCHANT, AND FORMING AN OPTICAL FIBER

Patent #:	6188511	Issue Dt:	02/13/2001	Application #:	08973458	Filing Dt:	12/05/1997
Title:	OPTICAL AMPLIFIER

Patent #:	6307679	Issue Dt:	10/23/2001	Application #:	09011995	Filing Dt:	03/09/1998
Title:	FORMATION OF A REFRACTIVE INDEX GRATING

Patent #:	6104852	Issue Dt:	08/15/2000	Application #:	09029841	Filing Dt:	03/09/1998
Title:	OPTICAL WAVEGUIDE WITH PHOTOSENSITIVE REFRACTIVE INDEX CLADDING

Patent #:	6008926	Issue Dt:	12/28/1999	Application #:	09029901	Filing Dt:	03/11/1998
Title:	A DISCRETE ELECTROABSORPTION MODULATOR

Patent #:	6208672	Issue Dt:	03/27/2001	Application #:	09043480	Filing Dt:	03/23/1998
Title:	OPTICAL PULSE SOURCE

Patent #:	6061381	Issue Dt:	05/09/2000	Application #:	09043768	Filing Dt:	05/05/1998
Title:	OPTICALLY RESONANT STRUCTURE

Patent #:	5974073	Issue Dt:	10/26/1999	Application #:	09047508	Filing Dt:	03/25/1998
Title:	MIRRORS FOR SEMICONDUCTOR LASERS

Patent #:	6284437	Issue Dt:	09/04/2001	Application #:	09051122	Filing Dt:	04/01/1998
Title:	METHOD AND DEVICE FOR RECORDING A REFRACTIVE INDEX PATTERN IN AN OPTICAL MEDIUM

100

Patent #:	6052213	Issue Dt:	04/18/2000	Application #:	09051537	Filing Dt:	04/13/1998
Title:	OPTICAL DIFFRACTION GRATING

Assignor

BRITISH TELECOMMUNICATIONS PLC

Exec Dt:

02/21/2008

Assignee

IPG PHOTONICS CORPORATION

50 OLD WEBSTER ROAD

OXFORD, MASSACHUSETTS 01540

Correspondence name and address
	DAVID KLEINSMITH
	P.O. BOX 1022
	MINNEAPOLIS, MN 55440-1022

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