Automatic comparison calibration device
CA 1082814 A · Owner: Merklinger, Harold M. · Inventors: Merklinger, Harold M.; Trider, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for comparing an unknown signal with a reference signal is adapted to determine their ratio and where a variation exists, to compensate the unknown signal to achieve unity ratio. The apparatus includes circuit means connectable to the signals for obtaining sum and difference signals. Means responsive to the sum and difference signals produce a control signal representing the product of these signals and feedback means responsive to the control signal generate a time-averaged feedback signal that is a measure of the ratio of the mean squares of the unknown and reference signals. Control means are are disposed in the path of the unknown signal and are responsive to the feedback …
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 July 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 1997.
- 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.