Ball point pen

Details Ball point pen Ball point pen

1989-10-06

1992-01-14

Dunkins, Bruce W.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 43, D19 50, D19 51, D19 56, D19 57

Patent

active

D03231860

REFERENCES:
patent: D57397 (1921-03-01), Taussig
patent: D107964 (1938-01-01), Marshall
patent: D174250 (1955-03-01), Daniels
patent: D208680 (1967-09-01), Summers
patent: D256136 (1980-07-01), Muller
patent: D284773 (1986-07-01), Schwartz et al.
patent: D285730 (1986-09-01), Bulwick
patent: D287603 (1987-01-01), Bruhn
patent: D307034 (1990-04-01), Petterson
patent: D310542 (1990-09-01), Regnault
patent: D314978 (1991-02-01), Oka

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