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. 09, 2004
Filed:
Mar. 25, 2002
Applicant:
Inventor:
Hiroshi Touge, Ichinomiya, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60R 2/510 ;
U.S. Cl.
CPC ...
B60R 2/510 ;
Abstract
A closed space monitor system monitors the closed space by detecting a change in the air flow and the volume change of the closed space. The closed space monitor system includes a transmitter for generating and transmitting a compression wave of gas, a receiver for receiving the compression wave of gas, a inverting amplifier for amplifying the signal from the receiver via an electric current-voltage conversion portion, and automatic gain control portion. The amplified signal from the receiver is transmitted from the transmitter for generating the stationary wave in the closed space.