Optical cable
CA 2070229 C · Owner: Ishikawa, Hiroki · Inventors: Kitayama, Yoshinobu; Ishikawa, Hiroki; Sano, Hiroaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is an optical cable using multifiber optical units. Each of said multifiber optical units has a lamination body of a tape-type optical unit accommodated in a groove formed in a rod-like member. The tape-type optical unit is constituted by a plurality of optical fibers arranged in one row and coated collectively. The improvement is that the distance between the center of the rod-like member and a bottom portion of said groove is made to be equal to or larger than a half of the height of the lamination body to thereby reduce side pressure exerted on the tape type optical units 1 at the groove bottom portion thereof.
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 June 2, 1992 and granted March 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 2, 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.