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3400878
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Information
Patent Grant
3400878
References
Source
Patent Number
3,400,878
Date Filed
Not available
Date Issued
Tuesday, September 10, 1968
56 years ago
CPC
B65D5/4204 - Inspection openings or windows
B31B1/82 - Attaching windows
B31B2201/9076 - Forming or attaching windows
Y10S493/905 - having window
Y10S493/944 - Aperture card or display device with window
US Classifications
229 - Envelopes, wrappers, and paperboard boxes
493 - Manufacturing container or tube from paper
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