Notebook insert with calculator and holepunch

Details Notebook insert with calculator and holepunch Notebook insert with calculator and holepunch

1991-12-09

1993-05-11

Rosenbaum, Mark

Binder device releasably engaging aperture or notch of sheet

Sheet retainer with separate aperture making device

402 4, 30123, B42F 300

Patent

active

052095924

ABSTRACT:
A notebook insert comprises a housing, an electronic calculator attached to the housing and a holepunch assembly also attached to the housing. The housing has a periphery with multiple holes therethrough which are spaced to be adapted for engagement with the rings of a ringed notebook. The housing, electronic calculator, and holepunch assembly are sufficiently thin for convenient use of the notebook insert in a ringed notebook.

REFERENCES:
patent: 2105233 (1938-01-01), Schade
patent: 4075702 (1978-02-01), Davies
patent: 4729688 (1988-03-01), Manz
patent: 4832191 (1989-05-01), Gerver et al.
patent: 4918632 (1990-04-01), York
patent: 5093760 (1992-03-01), Bedol
Jacobs Gardner, Office Supply Catalog, 1990, p. 1024.

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