Title:
Writing instrument
United States Patent 3338216


Inventors:
Roller Sr., Frank W.
Application Number:
US51999666A
Publication Date:
08/29/1967
Filing Date:
01/11/1966
Assignee:
ESTERBROOK PEN COMPANY
Primary Class:
Other Classes:
401/292
International Classes:
B43K1/06; B43K8/02
View Patent Images:
US Patent References:
3203025Writing instrument1965-08-31
3113336Ink marker1963-12-10
2872899Writing instrument1959-02-10
1878879Duplex pen1932-09-20
Foreign References:
AT200473B1958-11-10