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:
Sep. 27, 1983
Filed:
Jun. 15, 1981
Applicant:
Inventor:
Daniel R von Recklinghausen, Arlington, MA (US);
Assignee:
Electro Audio Dynamics, Inc., Great Neck, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
179 / ; 179 / ; 1791 / ;
Abstract
An improved circuit for a transducer or loud-speaker as used in the measurement of acoustic quantities such as in impedance audiometers for providing accurate linear read outs.