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. 11, 1993
Filed:
Jul. 02, 1992
Applicant:
Inventor:
Yoshihiro Koyanagi, Taiheiji, Kashihara-shi, Osaka-fu, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137852 ; 137844 ; 137846 ;
Abstract
A check valve for bags containing goods such as rice or other grains or foods. The valve is used to discharge excessive air from the bag while preventing outside air from entering the bag. The check valve is constructed of plural plastic films joined together.