Perforated sheet

Details Perforated sheet Perforated sheet

1997-01-31

1999-08-31

Holtje, Martie K.

Office supplies; artists and teachers materials

Paper or pasteboard for writing or printing

D19 33, 1901

Patent

active

D04133536

REFERENCES:
patent: D166504 (1952-04-01), Slingerland
patent: D312654 (1990-12-01), Giordano
patent: D315922 (1991-04-01), Giordano
patent: 0804720 (1905-11-01), Halle
patent: 2121203 (1938-06-01), Knoble
patent: 2148155 (1939-02-01), Grossman
patent: 3807069 (1974-04-01), Daley
patent: 4448443 (1984-05-01), Jones
patent: 4484401 (1984-11-01), Pitts
patent: 4821439 (1989-04-01), Wilok
patent: 4962603 (1990-10-01), Kao et al.
patent: 5135261 (1992-08-01), Cusack et al.
patent: 5571587 (1996-11-01), Bishop et al.
Avery Worksaver Tab Inserts, Extra Wide, 1994.
Kleer-Fax Comercial Series Insertable Ring Book Indexes prior art perforated tab sheet, date unknown.
Postfax Insertable Loose Leaf Index perforated tab sheet, circa 1994.
Avery Worksaver Tab Inserts, 1994.
WilsonJones Gold Double-Reinforced Premier Insertable Indexes perforated tab sheet, 1990.

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