Optical fiber cable wound about overhead power transmission line
CA 2083025 A1 · Owner: Obara, Masami · Inventors: Obara, Masami; Yoshida, Satoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an optical fiber cable wound about an overhead transmission line stretched between supporting poles installed a predetermined distance apart from each other. The optical fiber cable comprises a tension member, a plurality of plural-core type optical fiber tape strands arranged on the outside of the tension member, a buffer layer positioned to cover the outer surface of the arrangement of the plural-core type optical fiber tape strands, and a sheath positioned to cover the outer surface of the buffer layer. The particular construction permits the optical fiber cable to house a larger number of optical fibers while maintaining a high heat resistance and satisfactory mechanical …
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 November 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 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
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.