WRITING INSTRUMENTS
United States Patent 3520629
US Patent References:
Writing instrument
- - 3338216

WRITING IMPLEMENT
- - 3421823


Inventors:
Otsuka, Katsumi
Publication Date:
07/14/1970
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Assignee:
TEIBOW CO LTD
Primary Class:
401/199
Other Classes:
401/265
International Classes:
B43K8/02; B43K8/00; B43K8/00; B43K1/00
Foreign References:
FR534992A
GB1061218A




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