Title:
Loose-leaf retaining device
United States Patent 2878815
US Patent References:
/0148521.html
- - 0148521

/0428805.html
- - 0428805

/1068115.html
- - 1068115

/1167639.html
- - 1167639

Loose-leaf binder
- - 1604262


Inventors:
Pluckebaum, Jerome J.
Publication Date:
03/24/1959
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Assignee:
MONTGOMERY PRINTING COMPANY
Primary Class:
402/69
Other Classes:
402/19, 281/21.100, 402/71
International Classes:
B42F13/12; B42F13/00
US Patent References:
1963447Loose-leaf binder
2234045Opener for plastic bindings