Multiple pen comprising a plurality of writing points of different colors
United States Patent 3274976
Inventors:
Francis, Levoin
Publication Date:
09/27/1966
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Export Citation:
Assignee:
Real, Patentauswertungs Anstalt
Primary Class:
Other Classes:
401/109
International Classes:
B43K24/16; B43K24/00
Foreign References:
| FR1356298A | ||||
| DE915905C | ||||
| DE1099392B |