Device for detecting polarization mode dispersions
CA 2337039 A1 · Owner: Siemens Aktiengesellschaft · Inventors: Noe, Reinhold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for detecting the polarisation mode dispersion of an optical data signal (OS), comprising at least two filters (FI1 FI2). A wattmeter (DET1, DET2) is arranged downstream from said filters. Compensation is improved by combining a large monotonicity range and a high rate of rise when several filters are used.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 1, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 1, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 1, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.