US PATENT SUBCLASS 402 / 63
.~.~ Notched or grooved retainer (e.g., screw threaded, etc.)

Current as of: June, 1999
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402 /   HD   BINDER DEVICE RELEASABLY ENGAGING APERTURE OR NOTCH OF SHEET

60  DF  SHEET RETAINER WITH RELEASABLE KEEPER (E.G., HOLD DOWN, ETC.) {3}
61  DF  .~ Keeper cooperating with retainer of varying cross-section {2}
63.~.~ Notched or grooved retainer (e.g., screw threaded, etc.)

DEFINITION

Classification: 402/63

(under subclass 61) Device wherein the variation in cross-section is in the form of a series of grooves or a continuous helical groove (i.e., threaded, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

52+, for a device including telescopic sheet retainers with means including plural notches to telescopically drive or secure such retainers; subclasses 50+, for such device where such means is disposed remote from the retainers.