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Class Information
Number: 402/52
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 > Notched or grooved means
Description: Device wherein the means to drive or secure the opposing telescopic first and second sheet retainers includes at least one recess or aperture in a surface of one of the sheet retainers and means associated with the other sheet retainer for engaging said recess or aperture.

Sub-classes under this class:

Class Number Class Name Patents
402/53 Screw threaded 9

Patents under this class:

Patent Number Title Of Patent Date Issued
8573876 Soft close ring binder mechanism with mating ring tips Nov. 5, 2013
8079412 Method and apparatus for mitigating environmental impact due to fluid leaks Dec. 20, 2011
6276862 Binder mechanism Aug. 21, 2001
6126354 Reusable binding system and method Oct. 3, 2000
5593243 Binder Jan. 14, 1997
5423624 Hinged loose-leaf retainer system Jun. 13, 1995
5338125 Modular book binder Aug. 16, 1994
5074696 Binding fastener assembly Dec. 24, 1991
4940353 Holder for paper-keeping bags Jul. 10, 1990
4932804 Loose leaf retainer for file folders Jun. 12, 1990
4930927 Tamper-proof binder for photographs and the like Jun. 5, 1990
4820075 Filing device Apr. 11, 1989
4730972 Book binding method, paper sheets binder and adjustable spine Mar. 15, 1988
4307972 Looseleaf books with plastic posts Dec. 29, 1981

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