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3103856
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Information
Patent Grant
3103856
References
Source
Patent Number
3,103,856
Date Filed
Not available
Date Issued
Tuesday, September 17, 1963
61 years ago
CPC
B31B29/84 - Forming valves or applying valve inserts
B31D5/0034 - for making valve inserts for bags
B65D31/14 - Valve bags
B31B2219/9054 - Applying rigid valves, spouts, or filling tubes
B31B2221/20 - the bags having structural provision at the base for thickness of content
US Classifications
493 - Manufacturing container or tube from paper
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