Per Granestrand
18Patents
8h-index
16Co-inventors
69Inventor score
Filing activity: Jun 10, 1986 → Apr 26, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4887309A | Optical repeater for fault tracing in an optical transmission system | Electricity | 27 | Expired |
| US8041164B2 | Transition device for optical waveguides | Emerging Cross-Sectional Technologies | 16 | Active |
| US4917449A | Method of disposing a polarization directing optoelectronic coupler and a coupler for carrying out the method | Physics | 16 | Expired |
| US5202941A | Four section optical coupler | Physics | 14 | Expired |
| US5303315A | Near Z digital switch | Physics | 13 | Expired |
| US4756588A | Polarization-independent optoelectronic directional coupler | Physics | 12 | Expired |
| US6922431B1 | Communication using spread spectrum methods over optical fibers | Electricity | 10 | Expired |
| US6181860A | Optical waveguide designed to facilitate connections with optical componentry and fibers | Physics | 9 | Expired |
| US6014250A | Laser amplifier, an optical system comprising such a laser amplifier and a method of forming such a laser amplifier | Electricity | 4 | Expired |
| US6826203B1 | High yield DFB laser with effective reject selection | Electricity | 2 | Expired |
| US9885828B2 | Optical waveguiding part | Physics | 1 | Active |
| US6914924B2 | Optical device and fabrication thereof | Electricity | 1 | Expired |
| US8306370B2 | Mach zehnder modulator | Physics | 0 | Active |
| US11670907B2 | Tunable semiconductor laser device | Electricity | 0 | Active |
| US9921370B2 | Waveguide for extraction of light at low levels of reflection | Physics | 0 | Active |
| US7065119B2 | Distributed feedback laser with varying electrical resistance for uniform gain inside the optical waveguide | Electricity | 0 | Expired |
| US12348003B2 | Tunable semiconductor laser device | Electricity | 0 | Active |
| US11081863B2 | Optical device and method for controlling such a device | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.