Diagonal paper sorter

Details Diagonal paper sorter Diagonal paper sorter

1991-06-28

1993-02-23

Holtje, Nelson C.

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Holder or file

D19 86, D19 91, D19 92

Patent

active

D03334899

REFERENCES:
patent: D201411 (1965-06-01), Tucker
patent: D202315 (1965-09-01), Tucker
patent: D250960 (1979-01-01), Bitner, Jr. et al.
patent: 1419485 (1922-06-01), Arcaro et al.
patent: 1966555 (1934-07-01), LeFebure
patent: 4163497 (1979-08-01), McEwen
patent: 4944412 (1990-07-01), Daigre

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