Technical pen adapter

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Description

FIG. 1 is a perspective view of a technical pen adapter showing our new design;

FIG. 2 is a right side elevational view thereof, the environmental structure shown in dotted lines depicting the barrel and head of a technical pen is for illustrative purposes only and not a part of the design;

FIG. 3 is an enlarged scale top plan view thereof;

FIG. 4 is an enlarged scale left side elevational view thereof; and

FIG. 5 is a front elevational view thereof.

Referenced Cited
U.S. Patent Documents
D262976 February 9, 1982 Koelichen, Jr.
Other references
  • Post Professional Drafting Rm. Eq. & Supplies Cat. 1969, p. 54, Item No. 890 R. Dietzgen Drafting Eq. Supplies & Fur. Cat. No. 2, 1978, p. 5, Item no. 718KA.
Patent History
Patent number: D288336
Type: Grant
Filed: Jun 27, 1984
Date of Patent: Feb 17, 1987
Inventors: J. Frank Carroll (Bellevue, WA), Edward M. Williamson (Seattle, WA)
Primary Examiner: George P. Word
Law Firm: Christensen, O'Connor, Johnson & Kindness
Application Number: 6/625,219