Optical transmission system
CA 2086049 A1 · Owner: Van De Voorde, Ingrid Zulma Benoit · Inventors: Verbiest, Willem Jules Antoine; Van Der Plas, Gert; Sierens, Christiaan Hendrik Jozef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
11 - I. VAN DE VOORDE-D. MESTDAGH-, G. VAN DER PLAS-C. SIERENS W.VERBIEST 2-7-5-5-9, ABSTRACT, OPTICAL TRANSMISSION SYSTEM The system includes two transmitters (T1 T2) and, two receivers (R1, RZ). One transmitter (T1) includes a wavelength tunable laser, sending an FSK optical signal (OS1) which has a constant intensity. In a first receiver (R1) this FSK optical signal (OS1) is transformed into an IM signal (OS1') by an optical pass band filter. This IM signal (OS1') is then detected by a first direct detection receiver (DM). In a second direct detection receiver (R2) the FSK optical signal (OS2) is not detected since it has, constant intensity. A second transmitter (T2) includes a Fabry …
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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 December 22, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2014.
- 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
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Sources & verification
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.