US PATENT SUBCLASS 493 / 944
APERTURE CARD OR DISPLAY DEVICE WITH WINDOW
Current as of:
June, 1999
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493 /
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MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB
944
APERTURE CARD OR DISPLAY DEVICE WITH WINDOW
DEFINITION
Classification: 493/944
APERTURE CARD OR DISPLAY DEVICE WITH WINDOW:
Operation involving the construction of a member of nontransparent material which member has an opening for passage of light therethrough.