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.:
Date of Patent:
May. 05, 1992
Filed:
Apr. 11, 1988
Applicant:
Inventors:
Robert E Morley, Jr, Richmond Heights, MO (US);
A Maynard Engebretson, Ladue, MO (US);
George L Engel, Crestwood, MO (US);
Thomas J Sullivan, Kirkwood, MO (US);
Assignee:
Central Institute for the Deaf, St. Louis, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; H04R / ;
U.S. Cl.
CPC ...
36472419 ; 381 68 ;
Abstract
An electronic filter for filtering an electrical signal. Signal processing circuitry therein includes a logarithmic filter having a series of filter stages with inputs and outputs in cascade and respective circuits as