Receiving system having a pre-selected directional rejection characteristic
CA 1091588 A · Owner: Polaroid Corporation · Inventors: Wray, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A receiving system includes a linear array of receivers, each of which is responsive to incident stimuli for producing an output signal, and signal processing means for processing the output signals to provide the array with pre-selected directional rejection characteristics. Such processing includes obtaining sum and difference signals from the outputs of pairs of the receivers, integrating the difference signal, and combining the integrated signal with the sum signal such that stimuli incident on the array at a predetermined angle and at a predetermined frequency are substantially rejected. The angle and frequency at which rejection takes place are selected on the basis of the spacing …
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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 December 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 1997.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.