Spirometer

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Description

FIG. 1 is a side elevational view of a spirometer, showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a bottom perspective view thereof; and,

FIG. 4 is a bottom plan view thereof, the top view being identical thereto.

Referenced Cited
U.S. Patent Documents
2837083 June 1958 Lanooy
4221381 September 9, 1980 Ericson
4232683 November 11, 1980 Bartholomew et al.
4441505 April 10, 1984 Edwards et al.
Patent History
Patent number: D302464
Type: Grant
Filed: Jun 20, 1986
Date of Patent: Jul 25, 1989
Inventor: Daniel Quirke (Rochester, Kent, ME1 2AZ)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Stella M. Reid
Law Firm: Roylance, Abrams, Berdo & Goodman
Application Number: 6/876,903
Classifications
Current U.S. Class: D24/17