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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4065735 B1

PDFFull Text
Date of Patent:
Dec. 27, 1977

Filed:

Jan. 12, 1976

Electrical filters including coupled resonators

Applicant:
Inventors:

John S Palfreeman, Brockham, EN;

Martin Redwood, Sevenoaks, EN;

Frederick W Smith, Sutton, EN;

Richard F Mitchell, Kingston, EN;

Assignee:

U.S. Philips Corporation, New York, NY (US);

Attorneys:

Trifari; Frank R.

Franzblau; Bernard

Primary Examiner:

Alfred E Smith

Assistant Examiner:

Marvin Nussbaum

Int. Cl.
CPC ...
H03H / ; H03H / ; H03H / ; H03H / ;
U.S. Cl.
CPC ...
333 72 ; 310313 ; 310366 ; 333 / ;
Abstract

A surface acoustic wave band-pass filter comprising a piezoelectric substrate having on one surface first and second SAW resonators tuned to the same frequency and coupled together. An input transducer is coupled to the first resonator and an output transducer is coupled to the second resonator. Each resonator is preferably formed by two spaced apart aligned grating reflectors and the two resonators are preferably coupled by an array of discrete parallel metallic strips extending between the two cavity resonators.

Find Patent Forward Citations

Palfreeman, John. (1977). Electrical filters including coupled resonators (U.S. Patent No. 4065735). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4065735

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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