Inventor · disambiguated record
Sten Helmfrid
Also filed as: HELMFRID STEN
6 granted patents·102 citations·filing 1992–2008
81Inventor score
Top patents by PatentIndex Score
6 records- 0187US5377212ASolid-state laser device including uniaxial laser crystal emitting linearly polarized fundamental wave and nonlinear optical crystal emitting linearly polarized harmonic waveHITACHI LTD·Filed 1992·Granted Dec 27, 1994·57 cites·40 claims
- 0272US5854870AShort-wavelength laser light sourceHITACHI LTD·Filed 1993·Granted Dec 29, 1998·37 cites·34 claims
- 0360US7260292B2Optical couplerPROXIMION FIBER SYSTEMS AB·Filed 2005·Granted Aug 21, 2007·3 cites·11 claims
- 0450US7373046B2Optical add/drop multiplexersPROXIMION FIBER SYSTEMS A B·Filed 2006·Granted May 13, 2008·2 cites·20 claims
- 0546US8218922B2Channelized dispersion compensation moduleSAHLGREN BENGT·Filed 2008·Granted Jul 10, 2012·1 cites·20 claims
- 0645US7076133B2Optical couplingPROXIMION FIBER SYSTEMS AB·Filed 2001·Granted Jul 11, 2006·2 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →