Inventor · disambiguated record
Derwyn C. Johnson
Also filed as: JOHNSON DERWYN · JOHNSON DERWYN C
23 granted patents·2 pending applications·1,535 citations·filing 1976–2002
97Inventor score
Files withUNITED KINGDOM GOVERNMENT11CANADIAN PATENTS DEV9CA MINISTER INDUSTRY1HER MAJESY IN RIGHT OF CANADA1HILL KENNETH O1
Top patents by PatentIndex Score
25 records- 0198US5367588AMethod of fabricating Bragg gratings using a silica glass phase grating mask and mask used by sameUNITED KINGDOM GOVERNMENT·Filed 1992·Granted Nov 22, 1994·290 cites·29 claims
- 0297US5104209AMethod of creating an index grating in an optical fiber and a mode converter using the index gratingUNITED KINGDOM GOVERNMENT·Filed 1991·Granted Apr 14, 1992·157 cites·25 claims
- 0397US4763977AOptical fiber coupler with tunable coupling ratio and method of makingCANADIAN PATENTS DEV·Filed 1985·Granted Aug 16, 1988·192 cites·11 claims
- 0496US4291940ALow loss access coupler for multimode optical fiber distribution systemsCANADIAN PATENTS DEV·Filed 1977·Granted Sep 29, 1981·112 cites·9 claims
- 0595US4900119AWavelength selective optical devices using optical directional couplerCANADIAN PATENTS DEV·Filed 1988·Granted Feb 13, 1990·151 cites·10 claims
- 0695US4474427AOptical fiber reflective filterCANADIAN PATENTS DEV·Filed 1979·Granted Oct 2, 1984·85 cites·17 claims
- 0795US4107628ACW Brillouin ring laserCANADIAN PATENTS DEV·Filed 1977·Granted Aug 15, 1978·47 cites·5 claims
- 0891US5216739AMethod of creating an index grating in an optical fiber and a mode converter using the index gratingUNITED KINGDOM GOVERNMENT·Filed 1991·Granted Jun 1, 1993·58 cites·16 claims
- 0988US4021099AOptical couplers for fiber optic communication linksCANADIAN PATENTS DEV·Filed 1976·Granted May 3, 1977·52 cites·6 claims
- 1084US6374016B2Polarization insensitive grating in a planar channel optical waveguide and method to achieve the sameUNITED KINGDOM GOVERNMENT·Filed 2001·Granted Apr 16, 2002·27 cites·16 claims
- 1184US5495548APhotosensitization of optical fiber and silica waveguidesUNITED KINGDOM GOVERNMENT·Filed 1994·Granted Feb 27, 1996·61 cites·29 claims
- 1284US4457581APassive fiber optic data bus configurationsUNITED KINGDOM GOVERNMENT·Filed 1981·Granted Jul 3, 1984·41 cites·5 claims
- 1384US4330170ALow-loss star couplers for optical fiber systemsCANADIAN PATENTS DEV·Filed 1979·Granted May 18, 1982·40 cites·5 claims
- 1483US4895423AFabrication technique for low-loss fused taper directional couplers and pressure sensor produced therebyCANADIAN PATENTS DEV·Filed 1989·Granted Jan 23, 1990·46 cites·16 claims
- 1583US4779945ADirectional coupler utilizing biconically tapered optical fibers and a method of making sameHILL KENNETH O·Filed 1986·Granted Oct 25, 1988·53 cites·8 claims
- 1677US5054874ACoupler fabrication techniques for dissimilar fibersUNITED KINGDOM GOVERNMENT·Filed 1990·Granted Oct 8, 1991·44 cites·12 claims
- 1761US6597839B2Method and device for reducing polarization dependence in an optical component or optical systemCA MINISTER INDUSTRY·Filed 2001·Granted Jul 22, 2003·7 cites·29 claims
- 1855US6256435B1Polarization insensitive grating in a planar channel optical waveguide and method to achieve the sameUNITED KINGDOM GOVERNMENT·Filed 1999·Granted Jul 3, 2001·16 cites·10 claims
- 1952US6385369B1Method and device for reducing polarization dependence in an optical component or optical systemUNITED KINGDOM GOVERNMENT·Filed 1999·Granted May 7, 2002·15 cites·18 claims
- 2050USRE39865EMethod of fabricating Bragg gratings using a silica glass phase grating mask and mask used by sameHER MAJESY IN RIGHT OF CANADA·Filed 1999·Granted Oct 2, 2007·8 cites·41 claims
- 2150US5004316ACoupler fabrication techniques for dissimilar fibersUNITED KINGDOM GOVERNMENT·Filed 1986·Granted Apr 2, 1991·13 cites·3 claims
- 2247US4963177AMethod for making a grating assisted optical waveguide deviceCANADIAN PATENTS DEV·Filed 1989·Granted Oct 16, 1990·13 cites·9 claims
- 2339US2003103724A1High power optical fiber couplingFiled 2002·Application pending·0 cites
- 2437US5150439ASimplified wdm fused fiber coupler designUNITED KINGDOM GOVERNMENT·Filed 1991·Granted Sep 22, 1992·7 cites·6 claims
- 2534US2002057873A1Laser collimator for a free space optical linkJDS UNIPHASE CORP·Filed 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →