Twin-nibbed marking pen


FIG. 1 is a perspective view of a twin-nibbed marking pen showing my new design;

FIG. 2 is a rear elevational view;

FIG. 3 is a front elevational view;

FIG. 4 is a right side elevational view, the left side being a mirror image thereof;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view of my design with the cap members removed for convenience of illustration;

FIG. 8 is a front elevational view of FIG. 7;

FIG. 9 is a top plan view of FIG. 7; and

FIG. 10 is a bottom plan view of FIG. 7.

Referenced Cited
U.S. Patent Documents
D279992 August 6, 1985 Gribb
D295537 May 3, 1988 Davidson et al.
D295878 May 24, 1988 Lovell
D300640 April 11, 1989 Colletta et al.
1495890 May 1924 Day
3684389 August 1972 Eron et al.
3765780 October 1973 Guu et al.
4509875 April 9, 1985 Shintani
4557618 December 10, 1985 Iwata et al.
Other references
  • Visual Systems Co. Inc., Catalog .COPYRGT.1985 see page 125 top left, Berol double ended marker, Desk copy.
Patent History
Patent number: D313621
Type: Grant
Filed: Dec 18, 1987
Date of Patent: Jan 8, 1991
Assignee: Mitsubishi Pencil Co., Ltd. (Tokyo)
Inventor: Katsuhiko Yazaki (Urawa)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Martha Thompson
Application Number: 7/134,523