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. 30, 1977
Filed:
Oct. 30, 1975
Applicant:
Inventor:
Fumio Kobayashi, Hino, JA;
Assignee:
Sansui Electric Co., Inc., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K / ;
U.S. Cl.
CPC ...
181151 ;
Abstract
A loudspeaker device, wherein a speaker cabinet fitted with a speaker unit is filled with flexible gas-bearing material and fibrous cotton-like material. According to this invention, it is possible to increase the apparent inner volume of the cabinet, prevent the generation of a standing wave and reproduce sounds with a good quality.
Kobayashi, Fumio. (1977). Loudspeaker device (U.S. Patent No. 4044855). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4044855
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile