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:
Aug. 31, 1999
Filed:
Aug. 21, 1997
Applicant:
Inventors:
Ernst Lissel, Wolfsburg, DE;
Ulrich Bahr, Braunschweig, DE;
Assignee:
Volkswagen AG, Wolfsburg dex, US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
367181 ; 381191 ;
Abstract
An arrangement for determining the distance of objects has a number of electrostatic ultrasonic transducers which are formed from superposed layers. Fixed electrodes for the transducers and conductive tracks connected to them are formed in a first structured metal layer. The other layers are an insulation layer and a full-surface second metal layer on the insulation layer which provides counterelectrodes for the electrodes provided by the first metal layer.