Directional microphone system
CA 2097136 A1 · Owner: Zagorski, Michael A. · Inventors: Zagorski, Michael A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A directional microphone system gain adjusts the sum of signals that are received from two microphones mounted less than an inch apart. The gain adjustment is generally proportional to the product of the two microphone signals. Analog multipliers are used both for multiplying the signals together and also to form a gate that gain adjusts the sum of the signals.
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 May 27, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2015.
- 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.