US PATENT SUBCLASS 402 / 61
.~ Keeper cooperating with retainer of varying cross-section

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.~ Keeper cooperating with retainer of varying cross-section {2}
62  DF  .~.~> Apertured retainer
63  DF  .~.~> Notched or grooved retainer (e.g., screw threaded, etc.)

DEFINITION

Classification: 402/61

(under subclass 60) Device wherein the keeper releasably engages an exterior surface of the sheet retainer, per se, which retainer has structure which changes along the length thereof either dimensionally or in shape.