Paper hole drill

- Plus Corporation
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Description

FIG. 1 is a front elevational view of a paper hole drill showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a top, front and left side perspective view thereof.

Referenced Cited
U.S. Patent Documents
D101889 November 1936 Rix
D182387 March 1958 Seeger
2364011 November 1944 Wales
3452628 July 1969 Pfaffle
4221139 September 9, 1980 Peterson
Other references
  • Office Products Dealer; 1/1982; p. 90, first column, third panel down; Michael High Volume Production Paper Drill; MBM Corp. Advertisement; N.Y., N.Y.
Patent History
Patent number: D304456
Type: Grant
Filed: Mar 27, 1987
Date of Patent: Nov 7, 1989
Assignee: Plus Corporation
Inventor: Yoshihiro Takahashi (Tokyo)
Primary Examiner: Winifred E. Herrmann
Assistant Examiner: John Warchol
Law Firm: Darby & Darby
Application Number: 7/30,902