Viewing laryngoscope
CA 2004139 C · Owner: Lee, Tzium-Shou · Inventors: Lee, Tzium-Shou
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laryngoscope curved blade includes a pair of fiber optic bundles, one fiber optic bundle adapted to transmit light to the distal end of the blade and the other fiber optic bundle adapted to provide a viewing channel for telescopic viewing of the area adjacent to the distal end of the blade. A lens attached to the proximal end of the blade gathers and focuses the light transmitted by the viewing channel fiber optic bundle. Additionally a lamp located on, the proximal end of the blade provides illumination down the throat of a patient for line of sight viewing of the person performing the laryngoscope and the light transmitted by the first fiber optic bundle for illumination of the area …
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 29, 1989 and granted November 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2011.
- 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.