US PATENT SUBCLASS 493 / 944
APERTURE CARD OR DISPLAY DEVICE WITH WINDOW


Current as of: June, 1999
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493 /   HD   MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB

944APERTURE 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.