Spirometer base unit

- Welch Allyn, Inc.
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Description

FIG. 1 is a perspective view of a spirometer base unit showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a back elevational view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a left side elevational view thereof.

Referenced Cited
U.S. Patent Documents
3922525 November 1975 Kozak et al.
4138105 February 6, 1979 Hunger et al.
4391283 July 5, 1983 Sharpless et al.
4615340 October 7, 1986 Cronenberg et al.
4635647 January 13, 1987 Choksi
Patent History
Patent number: D332661
Type: Grant
Filed: Mar 30, 1990
Date of Patent: Jan 19, 1993
Assignee: Welch Allyn, Inc. (Skaneateles Falls, NY)
Inventor: Paul B. Sweeney, Jr. (Syracuse, NY)
Primary Examiner: Stella Reid
Law Firm: Wall and Roehrig
Application Number: 7/501,502
Classifications
Current U.S. Class: Hematological Or Intravenous Treatment (41) (D24/169)