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:
Jul. 06, 1976
Filed:
Jul. 02, 1974
Applicant:
Inventor:
Robert Nestor van Sluys, Eindhoven, NL;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
179 / ;
Abstract
Method of encoding quadraphonic signals in four channels, in which for each side the front signal is recorded together with the phase-shifted back signal, and the back signal is recorded together with the supplementarily phase-shifted front signal.
van Sluys, Robert. (1976). Encoding and decoding system for quadraphonic sound (U.S. Patent No. 3968331). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3968331
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile