Bound book with bound holder carrying loose-leaf pages

Details Bound book with bound holder carrying loose-leaf pages Bound book with bound holder carrying loose-leaf pages

1987-03-09

1989-03-14

Yost, Frank T.

Books, strips, and leaves

Book, element thereof, or accessory therefor

Binding

281 25R, 283 46, 402 79, B42D 100, B42D 106, G09B 1702, B42F 1300

Patent

active

048119733

ABSTRACT:
A book containing question or other instruction pages permanently bound therein by a binding such as a spiral wire binding. A holder of small lateral dimension is also bound by the permanent binding and carries loose-leaf answer or work pages secured to the holder by a loose-leaf binding such as a bendable metal strip. The book can be laid open flat or folded back on itself. The work pages can be used up and then replaced.

REFERENCES:
patent: 758220 (1904-04-01), Sixbey
patent: 2583998 (1952-01-01), Cook
patent: 2677376 (1954-05-01), Brunner
patent: 3620553 (1971-11-01), Donovan
patent: 4403883 (1983-09-01), Sorin
patent: 4428733 (1984-01-01), Kumar-Misir

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