Fountain pen pumping element
United States Patent 2489976
US Patent References:
Self-filling fountain-pen
- - 1392838

Pump
- - 1967580


Inventors:
Perwas, Ludwig F.
Publication Date:
11/29/1949
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Assignee:
Perwas, Ludwig F.
Primary Class:
401/178
Other Classes:
417/313, 417/513
International Classes:
B43K7/04; B43K7/00