Printed circuit board capable of preventing electromagnetic interference
CA 1261481 A · Owner: Tatsuta Electric Wire & Cable Co. Ltd. · Inventors: Wakita, Shinichi; Eguchi, Kazumasa; Nakatani, Fumio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is described an improved method of printing and a new printed circuit board for preventing electromagnetic interference. The board comprises a base plate and a first electrically conductive layer formed on at least one of the main surfaces of the base plate. The first electrically conductive layer includes a signal electrode and a ground electrode in accordance with the desired circuit pattern on the board. A second electrically conductive layer is formed to cover the first electrically conductive layer and is electrically insulated from the signal electrode thereon. The second electrically conductive layer is connected to the ground electrode of the first electrically conductive …
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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.