Communication apparatus and helmet
CA 2497675 C · Owner: Miranda, Stephen Alfred · Inventors: Miranda, Stephen Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A commu-nication , apparatus includes a support structure (41) that is , fastenable to a safety helmet (58). A vibration conduction , microphone (54) is carried by the support structure. , The vibration conduction microphone and the speaker , enclosure (43) are positioned so that, when the support , structure is fastened to the safety helmet, the vibration , conduction microphone and the speaker enclosure come , into contact with a rear of the wearer's head.
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 September 5, 2003 and granted June 19, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 5, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2025.
- 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.