Object search method and object search system
CA 2236195 C · Owner: Kanou, Yutaka · Inventors: Kanou, Yutaka; Watanabe, Kenshiu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An object search method and an object search system which reduce the time needed for coordinate transformation of a plurality of objects to be displayed as three-dimensional view data through viewing transformation. The system determines a reference box which circumscribes a view volume, created according to an eyepoint. The system determines a bounding box for each object. Each bounding box circumscribes the corresponding object. A 6-d tree composed of a plurality of nodes each having keys composed of the coordinate components of each bounding box is, prepared beforehand. With the coordinate components of the reference box as a search condition, the system searches the 6-d tree for …
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 April 28, 1998 and granted March 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2020.
- 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.