Title:
WRITING INSTRUMENT
United States Patent 3509786
US Patent References:
/0473207.html
- - 0473207


Inventors:
Buttner, Franz
Publication Date:
05/05/1970
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Assignee:
Franz, Buttner
Primary Class:
81/9.220
Other Classes:
30/362, 30/326
International Classes:
B43K8/22; B43K8/00; B43K5/00
Foreign References:
GB153084A




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