Sten Helmfrid
6Patents
3h-index
20Co-inventors
53Inventor score
Filing activity: Oct 16, 1992 → Feb 15, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5377212A | Solid-state laser device including uniaxial laser crystal emitting linearly polarized fundamental wave and nonlinear optical crystal emitting linearly polarized harmonic wave | Electricity | 38 | Expired |
| US5854870A | Short-wavelength laser light source | Electricity | 18 | Expired |
| US7260292B2 | Optical coupler | Physics | 3 | Expired |
| US7373046B2 | Optical add/drop multiplexers | Electricity | 1 | Active |
| US7076133B2 | Optical coupling | Physics | 1 | Expired |
| US8218922B2 | Channelized dispersion compensation module | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.