Pen

Office supplies; artists and teachers materials – Equipment for writing – drawing – or for fine arts – Marking instrument

Patent

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Details

D19 41, D19 46, D19 57

Patent

active

D03182932

REFERENCES:
patent: D11953 (1880-08-01), Gerow
patent: D109231 (1938-04-01), Roth
patent: D143612 (1946-01-01), Meyer
patent: D160030 (1950-09-01), Strauss
patent: D207040 (1967-02-01), Darst
patent: D210889 (1968-04-01), Angelis
patent: D246530 (1977-11-01), Zerschegg
patent: D246592 (1977-12-01), Zeischegg
patent: D260623 (1981-09-01), Gorski
patent: D303810 (1989-10-01), Von Den Benken
Engineering Craphics Fundamentals (.COPYRGT.1985) p. 128, see right rectangular pyrimid.

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