Dial control knob for medical instrument

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Description

FIG. 1 is a top plan view of a dial control knob for medical instrument showing my new design;

FIG. 2 is a side elevational view taken from the left of FIG. 1;

FIG. 3 is a front elevational view; and,

FIG. 4 is a rear elevational view.

The dial control knob is symmetrical about its axis.

Referenced Cited
U.S. Patent Documents
D68989 December 1925 Riehle
D197986 April 1964 Schlage
D218009 July 1970 Bosack
D219905 February 1971 Gottwald
D227568 July 1973 Thorp
Patent History
Patent number: D246691
Type: Grant
Filed: Jan 28, 1977
Date of Patent: Dec 20, 1977
Inventor: Nagashige Takahashi (Tokiwadai, Itabashi, Tokyo)
Primary Examiner: Wallace R. Burke
Assistant Examiner: B. J. Bullock
Attorney: Richard C. Sughrue
Application Number: 5/763,757
Classifications
Current U.S. Class: D/8310
International Classification: D0806;