Protective casing for a hand-held portable radio telephone
CA 1314940 C · Owner: Nec Corporation · Inventors: Tamura, Yoshiharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protective casing for a hand-held portable radio telephone has at least one antenna built therein which is usable in place of an antenna which is built in the telephone. When two antennas are provided in the protective casing, one of them which has a more intense electric field than the other is automatically selected during the course of conversation.
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
- Granted March 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2010.
- 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.