Cannula for withdrawing a test sample from a test tube

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Description

FIG. 1 is a front, bottom perspective view of a cannula for withdrawing a test sample from a test tube, showing my new design, the cannula being symmetrical about its axis; and

FIG. 2 is a top, rear perspective view thereof.

Referenced Cited
U.S. Patent Documents
3608550 September 1971 Stawaki
4368738 January 18, 1983 Tersteegen et al.
4653512 March 31, 1987 Losada
4690153 September 1, 1987 Losada et al.
4692156 September 8, 1987 Haller
Foreign Patent Documents
WO8705208 September 1987 SEX
Patent History
Patent number: D310722
Type: Grant
Filed: Jun 16, 1989
Date of Patent: Sep 18, 1990
Inventor: Bengt-Inge Broden (S-532 00 Skara)
Primary Examiner: A. Hugo Word
Assistant Examiner: Stella M. Reid
Law Firm: Sughrue, Mion, Zinn, Macpeak & Seas
Application Number: 7/367,517
Classifications
Current U.S. Class: D24/51