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Class Information
Number: 402/50
Name: Binder device releasably engaging aperture or notch of sheet > Opposed sheet retainers involving relative rectilinear travel > Telescopic retainers with means to telescopically drive and/or secure > Remote from retainer
Description: Device wherein the means to telescopically drive or secure the first sheet retainer relative to the second sheet retainer is disposed on the device in a position spaced from the retainers.

Sub-classes under this class:

Class Number Class Name Patents
402/51 Screw threaded means 5

Patents under this class:

Patent Number Title Of Patent Date Issued
4307972 Looseleaf books with plastic posts Dec. 29, 1981

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