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. 05, 1994
Filed:
Sep. 10, 1992
Maximilian H Hobelsberger, 5303 Wuenlingen, CH;
Other;
Abstract
The housings of the devices are divided by inner walls into two or three inner chambers. One of the inner chambers adjoins the membrane of the loudspeaker. Adjoining this inner chamber a membrane is built into an opening of an inner wall. Movements of the inner membrane, which are caused by pressure changes in this chamber, are servo supported by an inner electrodynamic transducer, whose membrane lies parallel behind the other inner membrane. The supporting movements are caused by a controller, which tries to hold constant the distance between the two inner membranes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile