Vehicle air-conditioning control apparatus
CA 1279388 C · Owner: Hitachi, Ltd. · Inventors: Horiguchi, Hiyosei; Tezuka, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a vehicle air-conditioning control apparatus for controlling the temperature and amount of air to be supplied to the interior of a vehicle room to control the air temperature in the room to a command value a, sunlit illumination sensor is provided including a plurality of photodetectors which have sensitivity characteristics varying with an incident angle of light and which are so arranged as to be oriented in different directions, an incident angle calculator is provided which calculates, on the basis of output signals of the photodetectors, an angle the sunlight ray makes to either of the righthand side and lefthand side of the vehicle and an angle of elevation of the sun relative to …
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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
- Granted January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2008.
- 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.