Notch filter
CA 1237489 A · Owner: Rca Corporation · Inventors: Ciszek, Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RCA 80,357, Abstract of Disclosure, A two-cavity notch filter including an input terminal inductively coupled to an output terminal having a low impedance connection therebetween a first, relatively high impedance resonant tank circuit including the series combination of a circuit grounded capacitor and circuit grounded inductor having a tap point thereon a, capacitor and optionally in series therewith an inductor connected between the input terminal and tap point. The notch filter also includes a second relatively high impedance resonant tank circuit including the series connection of a circuit grounded capacitor and circuit grounded inductor having a tap thereon and a capacitor, and, …
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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- 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.