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. 29, 1979
Filed:
Feb. 17, 1978
Applicant:
Inventors:
Robert C Whelan, Comberton, GB;
Charles J Sealey, Gt. Wilbraham, GB;
Assignee:
Strathern Audio Limited, Belfast, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
1791 / ;
Abstract
An electrodynamic loudspeaker has a diaphragm with a central driven area. Undriven areas of the diaphragm are baffled to minimize the effect of vibrations from the undriven areas which are out of phase with those in the central driven area.
Whelan, Robert. (1979). Pattern voice coil loudspeaker with baffles touching diaphragm (U.S. Patent No. 4156801). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4156801
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile