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:
Dec. 14, 1993
Filed:
Mar. 09, 1992
Katsuhiko Sugita, Ishikawa, JP;
Tsutomu Sainen, Ishikawa, JP;
Abstract
A device for noise attenuation attenuates the noises generated from weaving machines and comprises first conversion means for receiving a sound and outputting an electrical acoustic signal corresponding to the sound, first signal processing means for receiving the acousto-electric signal and outputting a first electrical signal having the frequency and amplitude corresponding to a sound to be attenuated on the basis of the received acoustic-electric signal, second signal processing means for receiving the first electrical signal and outputting a second electrical signal having the same frequency and inverted phase relative to the first electrical signal, and second conversion means for receiving the second electrical signal and generating a sound corresponding to the received second electrical signal.