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:
Mar. 29, 1977
Filed:
Feb. 17, 1976
Shinichiro Ishii, Neyagawa, JA;
Kanji Kakao, Katano, JA;
Takafumi Ueno, Kadoma, JA;
Jun Kimura, Kyoto, JA;
Matsushita Electric Industrial Co., Ltd., Osaka, JA;
Abstract
A multi-way speaker system comprising a tweeter, a squawker and a woofer wherein each of the speakers is arranged in staggered relation along their radiating axis at a predetermined spacing from each other and provided with an appropriate crossover network coupled to an input terminal of each of the speaker whereby sound pressure-frequency characteristics of a synthesized sound wave resulting from the synthesis of respective sound waves radiated from respective speakers are rendered flat, and phase frequency characteristics of said synthesized sound wave are rendered linear, over an entire band to improve a waveform transmission characteristic of an overall speaker system.