Combined temperature and humidity detection instrument

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Description

FIG. 1 is a top, front and left side perspective view of a combined temperature and humidity detection instrument showing my new design;

FIG. 2 is a top, rear and right side perspective view; and,

FIG. 3 is a top plan view thereof.

The bottom plan view being flat, plane and unadorned.

Referenced Cited
U.S. Patent Documents
D314155 January 29, 1991 Toivonen
2571628 October 1951 Stanley
3771364 November 1973 Worthington
3855863 December 1974 Kuehn et al.
Patent History
Patent number: D331024
Type: Grant
Filed: Sep 17, 1990
Date of Patent: Nov 17, 1992
Inventor: Peter H. DeRidder (West Bloomfield, MI)
Primary Examiner: Donald P. Walsh
Assistant Examiner: Antoine D. Davis
Law Firm: Dykema Gossett
Application Number: 7/583,710